One of the three primary germ layers; covers the surface of the embryo and gives rise to the nervous system, the epidermis and associated glands, and a variety of other structures.
Outermost of the three primary cell layers of the animal embryo; gives rise to epidermal tissues, the nervous system, and external sense organs. See also endoderm and mesoderm. ( Figure 23-5)
initially the dorsal, later the external, limiting tissue of the entocyst disc and the embryo. In the early stages, an especially powerful layer of cells.
the outermost of the three primary embryonic germ layers, which gives rise to nervous tissue and the epidermis.
one of three germ layers that develops into the skin and nervous system.
(Greek, ecto = outside + derma = skin) The layer (of the 3 germ cell layers) which form the nervous system from the neural tube and neural crest and also generates the epithelia covering the embryo. (More? Week 3 Notes)
The ectoderm is a germ layer which is divided into surface ectoderm (giving rise to epidermis, adenohypophysis, etc.) and neural ectoderm (giving rise to the neural tube and neural crest). See Ross and Romrell, p. 68-9.
Gr. ektos: outside + derma: skin] • The outermost of the three embryonic tissue layers first delineated during gastrulation. Gives rise to the skin, sense organs, nervous system, etc.
The outer of the three embryonic germ layers. The ectoderm gives rise to the neural tissue and epidermis.
the outer layer of cells of an embryo from which the nervous system, skin, hair, teeth, and so on are developed.
The "upper" layer of the embryo as the inner cell mass forms a circular disk two cells thick, giving rise with further embryonic development to the skin, brain and spinal cord. Synonym: epiblast. See also: endoderm See also: mesoderm
The outer basic layer of tissue in those animals with true tissues. In vertebrates, for instance, the embryonic ectoderm differentiates into the skin and also the nervous system.
(EHK-to-derm) One of three primary germ layers in the developing embryo. It gives rise to the nervous system and to the epidermis and its derivatives.
Outer layer of cells in the developing embryo that gives rise to the skin, nails, and hair.
the outer germ layer that develops into skin and nervous tissue
Outermost of the three germ layers gives rise to skin, associated organs and the nervous system of the future organism
Greek ektos = outside, and derm = skin, hence, the outermost germ layer of the embryo.
The embryo starts off as a 3 layered disc. This is the outermost layer
EK-TOE-derm The outermost embryonic germ layer, whose cells become part of the nervous system, sense organs, outer skin layer, and its specializations. 220
The outer cellular layer of an embryo that gives rise to the epithelium of the skin.
The outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and, in some phyla, to the nervous system, inner ear, and lens of the eye.
The outermost layer of embryonic cells, responsible for forming epidermis and nervous system.
Outer part of the germ layer. Ectoderm cells develop into skin, hair, teeth, eye lens and inner ear. The neuroectoderm forms the neural tube and the neural crest.
The outer layer of cells in embryonic development; gives rise to the skin, brain, and nervous system. Also, the outermost tissue layer in þatworms.
the outer of the three cell layers which form, as the clump of early embryonic cells begins to differentiate. The ectoderm will form the epidermis of the skin and the nervous system. The other two layers are the mesoderm and the endoderm. www.dental-site.itgo.com/glossary.htm The germ layer in an embryo that gives rise to the epidermis and nervous system. In many cases, as in vertebrates, an anterior and posterior invagination of ectoderm gives rise to the stomodeum and proctodeum, respectively. www.developmentalbiology.com/server_pages/lab_book/glossary/E.html
The outside layer of the cells of the inner cell mass of the blastocyst. If these cells develop fully, they grow into skin, nerve and brain cells.
Upper, outermost layer of a group of cells derived from the inner cell mass of the blastocyst; it gives rise to skin nerves and brain.
the outermost of the three germ layers of an animal embryo. Ectoderm gives rise to the skin, nervous system, and the adrenal medulla.
Gr. ektos - outside, without; Gr. derma - skin, leather]. The outermost germ layer of the embryo that develops during gastrulation. It will form the nervous system, epidermis, and their accessory structures.
The outer layer or cells in the multilayered embryo.
One of the three primordial germ layers of all triploblast animals. Ectoderm may be the "original" tissue of all animals. Generally, ectoderm is composed of the cells that are left on the outside after the blastula undergoes gastrulation. This basic ectodermal material, somatic ectoderm, goes on to form the skin, other epidermal structures, and various more-or-less external sensory structures. Other ectoderm, apparently under the influence of mesoderm, differentiates into neural and skeletal structures. See neural crest and neural tube.
Ectoderm is the outermost of the three primary layers of cells of the embryo, and gives rise to epidermis and nervous tissue.
The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.
Ectoderm is the germ layers of the developing baby that include skin, teeth, the glands of the mouth, the nervous system, and pituitary gland.
Gr. 'outer skin'. Refers to the outer germ layer giving rise to the nervous system and to the epidermis of the skin ( Ch. 1).
The outer germ layer of the embryo giving rise to the epithelium of the skin.
The ectoderm is the start of a tissue that covers the body surfaces. It emerges first and forms from the outermost of the germ layers.