embryo axis

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• Embryo — An embryo (from Greek: Polytonic|ἔμβρυον , plural Polytonic|ἔμβρυα , lit. that which grows, from en in + bryein to swell, be full ) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division… …   Wikipedia

• Axis — 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… …   Medical dictionary

• Embryo — The organism in the early stages of growth and differentiation from fertilization to, in humans, the beginning of the third month of pregnancy. After that point in time, it is termed a fetus. * * * 1. An organism in the early stages of… …   Medical dictionary

• axis — 1) a line 2) the anterior posterior axis of the embryo …   Dictionary of ichthyology

• Cleavage (embryo) — In embryology, cleavage is the division of cells in the early embryo. The zygotes of many species undergo rapid cell cycles with no significant growth, producing a cluster of cells the same size as the original zygote. The different cells derived …   Wikipedia

• anterior-posterior axis — the principal axis of the embryo. Also called rostrocaudal axis and embryonic axis …   Dictionary of ichthyology

• animal-vegetal axis — a line passing through the animal and vegetal poles of the embryo before epiboly …   Dictionary of ichthyology

• embryonic axis — an elongate thickening of blastoderm tissue; the primitive differentiation of the embryo …   Dictionary of ichthyology

• embryonic 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 …   Medical dictionary

• Regional specification — In the field of developmental biology, regional specification is the process by which different areas are identified in the development of the early embryo. The process by which the cells become specified differs between organisms. Contents 1… …   Wikipedia

• angiosperm — /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) …   Universalium