primary ectoderm
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Ectoderm — One of the three primary germ cell layers (the other two being the mesoderm and endoderm) that make up the very early embryo. The ectoderm is the outermost of the three layers. It differentiates to give rise to many important tissues and… … Medical dictionary
ectoderm — noun Etymology: International Scientific Vocabulary Date: 1859 1. the outer cellular membrane of a diploblastic animal (as a jellyfish) 2. a. the outermost of the three primary germ layers of an embryo that is the source of … New Collegiate Dictionary
Derivatives of primary germ layers — ▪ Table Derivatives of primary germ layers Ectoderm epidermis cutaneous derivatives epithelium of: mouth; oral glands nasal passages sense passages central nervous system peripheral nervous system hypophysis; suprarenal medulla… … Universalium
Epiblast — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Section through the embryo. (Epiblast visible but not labeled.) Caption2 = Cell differentiation System = CarnegieStage = 3 Days = 8 Precursor = inner cell mass… … Wikipedia
germinal layers — Primary cell of the embryo: ectoderm, mesoderm, and endoderm, from which tissues and organs of the adult are formed; germ layer … Dictionary of invertebrate zoology
animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by … Universalium
human embryology — ▪ biology Introduction the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. The human body, like that of most animals, develops from a single cell produced by the union of… … Universalium
Neurulation — Neuroscience portal Transve … Wikipedia
Neural tube — Transverse section of half of a chick embryo of forty five hours incubation. The dorsal (back) surface of the embryo is towards the top of this page, while the ventral (front) surface is towards the bottom. (Neural tube is in green.) … Wikipedia
Embryology — 1 morula, 2 blastula 1 blastula, 2 gastrula with blastopor … Wikipedia
nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… … Universalium
