embryonic axis
1embryonic axis — an elongate thickening of blastoderm tissue; the primitive differentiation of the embryo …
2embryonic axis — an imaginary line from the head end to the tail end of an embryo or, before that, the line of elongation of the primitive streak and groove …
3embryonic anideus — a blastoderm in which no embryonic axis develops …
4Axis — The axis is the second cervical vertebra (symbol: C2). It is called the axis because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of C2. The joint between the axis and atlas is a pivot type of joint. It… …
5embryonic shield — a thickened arm of the germ ring representing the future longitudinal axis of the embryo …
6anterior-posterior axis — the principal axis of the embryo. Also called rostrocaudal axis and embryonic axis …
7egg axis — noun : an embryonic axis passing through the animal and vegetal poles of an egg …
8reproductive system, plant — Introduction any of the systems, sexual or asexual, by which plants reproduce. In plants, as in animals, the end result of reproduction is the continuation of a given species, and the ability to reproduce is, therefore, rather conservative …
9Gastrulation — of a diploblast: The formation of germ layers from a (1) blastula to a (2) gastrula. Some of the ectoderm cells (orange) move inward forming the endoderm (red). Gastrulation is a phase early in the embryonic development of most animals, during… …
10angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction any member of the more than 300,000 species of flowering plants (division Anthophyta) …
