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Primary layer of cells in embryonic development
A germ layer, primary germinal layer, or germinal layer is a primary layer of cells that forms during animal embryonic development. Germ layers form during
Germ_layer
Embryologic stage in which germ layers form
(three-layered). These three germ layers are the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer). These germ layers form as
Gastrulation
Phase of embryonic development
gastrulation and continues until birth. During organogenesis, the three germ layers formed from gastrulation (the ectoderm, endoderm, and mesoderm) form
Organogenesis
This is a list of cells in humans derived from the three embryonic germ layers – ectoderm, mesoderm, and endoderm. Trichocyte Keratinocyte Gonadotrope
List of human cell types derived from the germ layers
List_of_human_cell_types_derived_from_the_germ_layers
Outer germ layer of embryonic development
three primary germ layers formed in early embryonic development. It is the outermost layer, and is superficial to the mesoderm (the middle layer) and endoderm
Ectoderm
Origination and development of an organism
three germ layers; the endoderm (inner layer), mesoderm (middle layer), and ectoderm (outer layer). As seen in the figure below, each germ layer will become
Ontogeny
Gamete-producing cell
A germ cell is any cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive
Germ_cell
Inner germ layer of embryonic development
the three primary germ layers in the very early embryo. The other two layers are the ectoderm (outside layer) and mesoderm (middle layer). Cells migrating
Endoderm
Whole-grain rice, as opposed to white rice
bran and germ layer remain on, constituting the brown or tan colour of rice. White rice is the same grain without the hull, the bran layer, and the cereal
Brown_rice
Process by which animal embryos form and develop
animals) or three (triploblastic) germ layers. The embryo during this process is called a gastrula. The germ layers are referred to as the ectoderm, mesoderm
Animal_embryonic_development
Structure in early amniote embryogenesis
they will differentiate into the mesoderm germ layer that, together with endoderm and ectoderm germ layers, will give rise to all the tissues of the adult
Primitive_streak
Development and formation of the human embryo
Embryogenesis continues with the next stage of gastrulation, when the three germ layers of the embryo are formed. The processes of histogenesis, neurulation
Human_embryonic_development
is referred to as the germ ring and is made up of a superficial layer, the epiblast which will become ectoderm, and an inner layer called the hypoblast
Fish_development
undifferentiated cells. These cells are constituents of three primary germ layers, the endoderm, mesoderm, and ectoderm. The science of the microscopic
Histogenesis
American embryologist and academic
neural crest tissue of vertebrates may be viewed as a fourth embryonic germ layer. As such, the neural crest - in Hall's view - plays a role equivalent
Brian_K._Hall
Topics referred to by the same term
sexually Germ layer, a primary layer of cells that forms during embryonic development Cereal germ, the reproductive part of a cereal grain Tooth germ, an aggregation
Germ
State of having two germ layers in embryonic development
there are two primary germ layers: the ectoderm and endoderm. Diploblasts are the organisms which develop with two germ layers, and include Cnidaria and
Diploblasty
State of having three germ layers in embryonic development
the gastrula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm. Germ cells are set aside in the embryo at the blastula
Triploblasty
Biological kingdom
germ layers, an external ectoderm and an internal endoderm. In most cases, a third germ layer, the mesoderm, also develops between them. These germ layers
Animal
Collection of tissues with similar functions
generally have common embryologic origins, often arising from the same germ layer. Organs are present in most multicellular organisms. In single-celled
Organ_(biology)
Middle germ layer of embryonic development
middle layer of the three germ layers that develops during gastrulation in the very early development of the embryo of most animals. The outer layer is the
Mesoderm
Malignancy that develops from epithelial cells
arises from cells originating in the endodermal, mesodermal or ectodermal germ layer during embryogenesis. Carcinomas occur when the DNA of a cell is damaged
Carcinoma
Type of biological tissue in animals
from the mesenchyme, derived from the mesoderm, the middle embryonic germ layer. The three meninges, membranes that envelop the brain and spinal cord
Connective_tissue
Branch of biology, studying prenatal biology
vertebrates. The bilaterian gastrula then develops three distinct layers of cells (the germ layers, endoderm, mesoderm and ectoderm); from them all the bodily
Embryology
Hard structure of the mouth
varying density and hardness that originate from the outermost embryonic germ layer, the ectoderm. The general structure of teeth is similar across the vertebrates
Tooth
Ability of a cell to differentiate into other cell types
identical totipotent cells, which can later develop into any of the three germ layers of a human (endoderm, mesoderm, or ectoderm), or into cells of the placenta
Cell_potency
embryo which exists as three different germ layers – the ectoderm, the mesoderm and the endoderm. These layers are arranged on top of each other, giving
Trilaminar_embryonic_disc
Basic unit of life forms
differentiate from the germ layers. The sponge has only one layer. Some other animals known as diploblasts have two germ layers the ectoderm, and the endoderm
Cell_(biology)
Type of cell found in muscle tissue
triploblast (an organism having three germ layers), and that diploblasty, meaning an organism with two germ layers, evolved secondarily, because they observed
Muscle_cell
Study of how organisms develop and grow
into a three layered structure consisting of multicellular sheets called ectoderm, mesoderm and endoderm. These sheets are known as germ layers. This is the
Developmental_biology
Cells that give rise to the embryo in amniote development
the embryo proper through its differentiation into the three primary germ layers, ectoderm, mesoderm and endoderm, during gastrulation. The amniotic ectoderm
Epiblast
Phylum of animals
two germ layers: ectoderm and endoderm) also lack a coelom, those technically do not have an acoelomate body plan because they lack the mesoderm germ layer
Xenacoelomorpha
Multicellular diploid eukaryote in its earliest stage of development
paracrine signalling from the amnion, is the formation of the three germ layers that will form all of the different parts of the body. Neurulation forms
Embryo
Scientific theories regarding the origins and formation of cells
was concluded that the germ layers are simultaneously formed during the cellularization process. This is in contrast to germ layer theory in which ectoderm
Cellularization
Process in developmental biology
Primordial germ cell (PGC) migration is the process of distribution of primordial germ cells throughout the embryo during embryogenesis. Primordial germ cells
Primordial germ cell migration
Primordial_germ_cell_migration
Malformation in veterinary medicine
covered with hairy skin. An amorphous globosus contains parts of all three germ layers; the differentiation of its contents can vary greatly. An amorphus globosus
Amorphous_globosus
Cancer of epithelial cells with glandular origin or characteristics
body. Epithelial tissue can be derived embryologically from any of the germ layers (ectoderm, endoderm, or mesoderm). To be classified as adenocarcinoma
Adenocarcinoma
Type of germ cell tumor
ovarian torsion, testicular torsion, or hydrops fetalis. They are a type of germ cell tumor (a tumor that begins in the cells that give rise to sperm or eggs)
Teratoma
Superphylum of bilateral animals
large clade Bilateria, i.e. animals with bilateral symmetry and three germ layers. Initially, Deuterostomia included the phyla Brachiopoda, Bryozoa, Chaetognatha
Deuterostome
Transformation of a stem cell to a more specialized cell
cellular blastomere differentiates from the single-layered blastula to the three primary layers of germ cells in mammals, namely the ectoderm, mesoderm and
Cellular_differentiation
Metaclass used to distinguish between cell forms
fundamental types: germ cells and somatic cells. During development, somatic cells will become more specialized and form the three primary germ layers: ectoderm
Cell_type
Class of congenital medical conditions
is still unknown. Interactions between the ectodermal and mesodermal germ layers, and the use of meclizine hydrochloride during pregnancy have been proposed
Hanhart_syndrome
Clade of animals whose mouth develops before the anus
Bilateria, animals with bilateral symmetry, anteroposterior axis and three germ layers. In animals at least as complex as earthworms, the first phase in gut
Protostome
Animals with embryonic bilateral symmetry
With few exceptions, bilaterian embryos are triploblastic, having three germ layers: endoderm, mesoderm and ectoderm, and have complete digestive tracts
Bilateria
Embryonic Stem Cells
distribution of the primordia for multiple derivatives of the three germ layers in the absence of extraembryonic tissues. Significantly, they lack fore-
Gastruloid
Layer of cells in mammalian embryos
intermediate mesenchyme is a narrow section of the mesoderm (the middle germ layer) located between the paraxial mesoderm and the lateral plate mesoderm
Intermediate_mesoderm
Unspecialized biological cell that can become specialized
pluripotent). This process starts with the differentiation into the three germ layers – the ectoderm, mesoderm and endoderm – at the gastrulation stage. However
Stem_cell
Type of bread made from white wheat flour
typically refers to breads made from wheat flour from which the bran and the germ layers have been removed from the whole wheatberry as part of the flour grinding
White_bread
dendrites.[citation needed] List of human cell types derived from the germ layers Human Cell Atlas Cell Ontology List of organs of the human body List
List_of_human_cell_types
Topics referred to by the same term
(female), a layer of cells covering the ovary Germinal epithelium (male), a layer of cells covering the testicle Germ layer, primary tissue layer formed during
Germinal_epithelium
Human protein-coding gene
within germ-layer organization during gastrulation. Gastrulation is a fundamental phase of vertebrate development in which three primary germ layers are
Cadherin-1
Division of the forebrain around the third ventricle
a neural tube is created from the ectoderm, one of the three primary germ layers, and forms three main vesicles: the prosencephalon, the mesencephalon
Diencephalon
Protective layer that lines the interior of hollow organs
Wiley Publishing. ISBN 9780470657294. OCLC 1036250938. "Chapter 25. Germ Layers and Their Derivatives - Review of Medical Embryology Book - LifeMap Discovery"
Mucous_membrane
Cell that composes cartilage
mesodermal germ layer, cells will continue to differentiate down into many different types of cells. On top of BMP-4 and FGF2 stimulating the mesodermal germ layer
Chondrocyte
anterior-posterior, etc.), and one or more layers of cells have been internalized, including the prospective gut. germ cell germ layer gonad histogenesis The process
Glossary of developmental biology
Glossary_of_developmental_biology
Study of the structure of organisms
animal are derived from the embryonic germ layers. Those simpler invertebrates which are formed from two germ layers of ectoderm and endoderm are called
Anatomy
Tissue lining the surfaces of organs in animals
arises from all three germ layers.[citation needed] Epithelia turn over at some of the fastest rates in the body. For epithelial layers to maintain constant
Epithelium
Anatomical structure
region of intermediate mesoderm. The mesoderm is the middle layer of the three germ layers, between the outer ectoderm and inner endoderm. During the third
Lateral_plate_mesoderm
migration continues until the extinction of the germ layer, at which point the remnants from the germ layer make up the eminences. Ganglionic eminences are
Ganglionic_eminence
Embryological process forming the neural tube
formation of the central nervous system (CNS) by signaling the ectoderm germ layer above it to form the thick and flat neural plate. The neural plate folds
Neurulation
Basal animal clade as a sister group of the Porifera
characteristics present in most eumetazoans include true tissues organized into germ layers, the presence of neurons and muscles, and an embryo that goes through
Eumetazoa
Organ in humans and other vertebrates
embryonic gut tube. Early in development, the human embryo has three germ layers and abuts an embryonic yolk sac. During the second week of embryogenesis
Gallbladder
Space inside the skull formed by eight cranial bones known as the neurocranium
three membrane layers; it contains the most collagen, and it is derived from the mesoderm - the middle germ layer or the primary layer of the cells formed
Cranial_cavity
Taxonomy to categorize human physiques
mesomorphic, and endomorphic. He created these terms borrowing from the three germ layers of embryonic development: The endoderm (which develops into the digestive
Somatotype and constitutional psychology
Somatotype_and_constitutional_psychology
Cancer originating in or on the ovary
ovary is made up of three different cell types including epithelial cells, germ cells, and stromal cells. When these cells become abnormal, they can divide
Ovarian_cancer
Physical barrier between the blood vessels and the seminiferous tubules of animal testes
of germ cells from the blood. A more correct term is the Sertoli cell barrier (SCB). The walls of seminiferous tubules are lined with primitive germ layer
Blood–testis_barrier
Embryonic inner cell mass tissue that forms the yolk sac and, later, chorion
bilateral symmetry. The other layer of the inner cell mass, the epiblast, differentiates into the three primary germ layers, ectoderm, mesoderm, and endoderm
Hypoblast
American-Israeli biomedical scientist
Spatiotemporal transcriptomics reveals the evolutionary history of the endoderm germ layer. Nature. 519, 219–222 (2015) Levin, M., Anavy, L., Cole, A. G., Winter
Itai_Yanai
Endogenous non-cancerous pluripotent stem cell
population. Muse cells are able to generate cells representative of all three germ layers from a single cell both spontaneously and under cytokine induction. Expression
Muse_cell
Organ of hearing and balance
different germ layer: the ectoderm, endoderm and mesenchyme. Around its second to third week, the developing embryo consists of three layers: ectoderm
Ear
Resilient and smooth elastic tissue present in animals
tissues. In embryogenesis, the skeletal system is derived from the mesoderm germ layer. Chondrification (also known as chondrogenesis) is the process by which
Cartilage
development continues with the next stage of gastrulation, when the three germ layers of the embryo form in a process called histogenesis, and the processes
Development_of_the_human_body
Layer on the inner face of a cell membrane
the sorting of germ layer progenitors during zebrafish gastrulation, the invagination of the mesoderm and the elongation of the germ band elongation
Cell_cortex
Protein-coding gene in the species Homo sapiens
early embryonic patterning, influencing the development of all three germ layers. In the mesoderm, FGF8 helps regulate somite formation through the Clock
Fibroblast_growth_factor_8
Prenatal development of the heart
right sides of the heart. The heart derives from embryonic mesodermal germ layer cells that differentiate after gastrulation into mesothelium, endothelium
Heart_development
Medical condition
dysplasia. These disorders affect tissues that arise from the ectodermal germ layer, such as skin, hair, and nails. Hay–Wells syndrome is autosomal dominant
Hay–Wells_syndrome
Japanese stem cell researcher (born 1962)
cell fate switches. They found transdifferentiation within germ layer and between germ layers, e.g., exocrine cells to endocrine cells, fibroblast cells
Shinya_Yamanaka
Development process of some animals
arthropods, the mesoderm (the middle germ layer) forms as a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then
Schizocoely
development. They are derived from the ectoderm germ layer, but are sometimes called the fourth germ layer because they are so important and give rise to
Cardiac_neural_crest
Exoskeleton of an animal in the phylum Mollusca
(Pteriidae). Like the other calcareous layers of the shell, the nacre is created by the epithelial cells (formed by the germ layer ectoderm) of the mantle tissue
Mollusc_shell
Fluid-filled sac in the ovary
cancerous potential. Malignant tumors discovered during pregnancy are usually germ cell, sex cord–gonadal stromal, or carcinomas, or slightly less commonly
Ovarian_cyst
Adult telomerase-positive stem cells. A unique, distinct group of Adult stem cells
PSCs Pluripotent stem cells (PSCs) 6–8 μm Pluripotent Somatic cells only Germ-layer lineage stem cells (GLSCs) 8–10 μm Transitional Between pluripotency and
Adult telomerase positive stem cells
Adult_telomerase_positive_stem_cells
Sphere of cells formed during early embryonic development in animals
gastrula in which the germ layers of the embryo form. A common feature of a vertebrate blastula is that it consists of a layer of blastomeres, known as
Blastulation
Topics referred to by the same term
a layer of cells covering the testicle Germinal epithelium (female), a layer of cells covering the ovary Germinal epithelium or germ layer, a layer of
Germinal
Russian geologist and embryologist (1794–1865)
of Baltic German origin. He was among the first to identify distinct germ layers involved in the development of the embryo, coining the term "blastoderm"
Christian_Heinrich_Pander
Type of pluripotent blastocystic stem cell
into all derivatives of the three primary germ layers: ectoderm, endoderm, and mesoderm. These germ layers generate each of the more than 220 cell types
Embryonic_stem_cell
A type of tissue
types in the adult human body List of human cell types derived from the germ layers Sapkota, Anupama (2020-09-28). "Transitional epithelium- definition,
Transitional_epithelium
Embryonic cell structure
Gastrulation occurs when pluripotent stem cells differentiate into the three germ cell layers: ectoderm, mesoderm and endoderm. During gastrulation, cells of the
Bilaminar_embryonic_disc
Primary type of cell found in the epidermis
Skin Corneocyte Keratin HaCaT List of human cell types derived from the germ layers Epidermidibacterium keratini List of distinct cell types in the adult
Keratinocyte
Digestive system in humans
plexuses arise. Early in embryonic development, the embryo has three germ layers and abuts a yolk sac. During the second week of development, the embryo
Human_digestive_system
Main body cavity in many animals
ISBN 978-0-7817-5726-3. Hall, B.K.; et al. (2008). "Animals Based on Three Germ Layers and a Coelem". Strickberger's evolution: the integration of genes, organisms
Coelom
Layer of cells in embryonic development
Endodermic evagination relates to the inner germ layers of cells of the very early embryo, from which is formed the lining of the digestive tract, of
Endodermic_evagination
Benign, borderline, or malignant neoplasm involving the ovary
Health Organization (WHO) divided ovarian tumours as 90% epithelial, 3% germ cell, and 2% sex cord-stromal types. Tumor of the ovary vary remarkably as
Ovarian_tumor
Preserved remains or traces of organisms from a past geological age
and a putative, primitive protostome, Pseudooides, provide a peek at germ layer embryonic development. These 543-million-year-old embryos support the
Fossil
Structure formed around day 5 of mammalian embryonic development
rise to the three germ layers of the developing embryo during gastrulation (endoderm, mesoderm, and ectoderm). The trophoblast is a layer of cells forming
Blastocyst
Medical condition
generally arises from cells originating in the endodermal or ectodermal germ layer during embryogenesis. Symptoms vary between individuals and can be dependent
Invasive_urothelial_carcinoma
Human disease caused by a lack of vitamin B3
else 90 minutes if not." The milling of corn removes the aleurone and germ layers, removing much of the (already low) amounts of bioavailable niacin and
Pellagra
Liver cell type
canalicular membranes, respectively List of human cell types derived from the germ layers The diameter of human hair ranges from 17 to 181 μm. Ley, Brian (1999)
Hepatocyte
German quack physician (1935–2017)
(necrosis or ulceration), or functional impairment—with the embryonic germ layer (endoderm, mesoderm or ectoderm) from which both the organ tissues and
Ryke_Geerd_Hamer
German physiologist and embryologist (1733–1794)
structural embryology—he laid the foundation for the germ layer theory. Wolff foreshadowed the germ layer theory by showing that the material out of which
Caspar_Friedrich_Wolff
GERM LAYER
GERM LAYER
Female
Icelandic
Icelandic form of Old Norse Gerðr, GERÃUR means "enclosure, stronghold."
Boy/Male
English
Spear hard.
Surname or Lastname
Americanized form of German Gehr.English
Americanized form of German Gehr.English : perhaps a variant of Geary 3.Hungarian : from a reduced form of the personal name Gergely, Latin Gregorius (see Gregory).
Male
German
Contracted form of Old High German Gerhard, GERD means "spear strong."
Female
Scandinavian
Scandinavian form of Old Norse Gerðr, GERD means "enclosure, stronghold."
Boy/Male
American, British, English, German
Form of Gerald; Rules by the Spear
Boy/Male
Teutonic
warrior.
Boy/Male
Norse
Guards the gate of Hell.
Male
German
Contracted form of Old High German Gerhardt, GERT means "spear strong."
Male
Spanish
Spanish form of Roman Latin Germanus, GERMÃN means "from Germany."
Female
Icelandic
Icelandic form of Old Norse Gerðr, GERÃA means "enclosure, stronghold."
Girl/Female
German
From the Old German name, meaning strong spear.
Girl/Female
Australian, Latin
Gem; A Jewel
Girl/Female
Norse
Protection.
Male
Hebrew
(גֵּרָ×) Hebrew name GERA means "a grain." In the bible, this is the name of several characters, including a son of Benjamin.
Girl/Female
American, British, English, French, German
Mighty with a Spear; Rules with Spear; Spear Ruler
Female
Norse
Old Norse name probably derived from the word garðr, GERÃR means "enclosure, stronghold." In mythology, this is the name of a frost giantess and wife of Freyr.
Girl/Female
British, Dutch, English, French, German
Strength of a Spear; Diminutive of Gertrude
Girl/Female
English American
Boy/Male
Biblical
Pilgrimage, combat, dispute.
GERM LAYER
GERM LAYER
Boy/Male
Gujarati, Hindu, Indian
The Supreme God; Powerful
Boy/Male
Hindu, Indian, Marathi
Lord Shiva; God of Mountain
Surname or Lastname
Welsh
Welsh : variant of Powell (see Howell).English (of Norman origin) : habitational name from Bouelles in Seine Maritime, France, so named with Old Norman French boelle ‘enclosure’, ‘dwelling’.
Girl/Female
Australian, Finnish, German, Greek, Italian, Polish, Swedish
Of the Sea; Sea; Ocean
Boy/Male
Hindu, Indian, Punjabi, Sikh, Tamil
Shiva's Wife
Boy/Male
Hindu, Indian, Sanskrit
Prepared
Boy/Male
Hindu, Indian, Marathi
Decorated with Three Lotus Flowers
Boy/Male
Hindu, Indian
Moon
Boy/Male
Indian, Punjabi, Sikh
Supreme God
Boy/Male
Muslim/Islamic
The Exaulter To Elevate Rank
GERM LAYER
GERM LAYER
GERM LAYER
GERM LAYER
GERM LAYER
n.
In Scotland, the time fixed for the payment of rents.
n.
See Germ.
v. t.
To daub, as the hands or clothing, with gorm; to daub with anything sticky.
n.
A piece of carved work placed under each end of the taffrail.
n.
To apply a term to; to name; to call; to denominate.
n.
A word or expression; specifically, one that has a precisely limited meaning in certain relations and uses, or is peculiar to a science, art, profession, or the like; as, a technical term.
n.
That from which anything springs; origin; first principle; as, the germ of civil liberty.
n.
That which is to develop a new individual; as, the germ of a fetus, of a plant or flower, and the like; the earliest form under which an organism appears.
n.
A small germ.
n.
Anything of small size, or expressed within brief limits, which is regarded as a gem on account of its beauty or value, as a small picture, a verse of poetry, a witty or wise saying.
a.
Relating to homodermy; originating from the same germ layer.
n.
The time for which anything lasts; any limited time; as, a term of five years; the term of life.
adv.
Term by term; every term.
n.
The inner germ layer; endoderm. See Nucleolus.
n.
A theory of generation in which each germ is supposed to contain the germs of all subsequent generations; -- the opposite of epigenesis.
n.
A point, line, or superficies, that limits; as, a line is the term of a superficies, and a superficies is the term of a solid.
v. i.
To germinate.
n.
A bud; a germ of a plant.
n.
The limitation of an estate; or rather, the whole time for which an estate is granted, as for the term of a life or lives, or for a term of years.