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animal pole |
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pole (pōl) 1. either extremity of any axis, as of the fetal ellipse or a body organ. 2. either one of two points which have opposite physical qualities.po´lar animal pole 1. the site of an oocyte to which the nucleus is approximated, and from which the polar bodies pinch off. 2. in nonmammalian species, the pole of an egg less heavily laden with yolk than the vegetal pole and exhibiting faster cell division. cephalic pole the end of the fetal ellipse at which the head of the fetus is situated. frontal pole of cerebral hemisphere the most prominent part of the anterior end of each hemisphere. germinal pole animal p. occipital pole of cerebral hemisphere the posterior end of the occipital lobe. pelvic pole the end of the fetal ellipse at which the breech of the fetus is situated. temporal pole of cerebral hemisphere the prominent anterior end of the temporal lobe. vegetal pole that pole of an oocyte at which the greater amount of food yolk is deposited.
animal pole Etymology: L, anima the active, formative part of an ovum. It contains the nucleus and the bulk of the cytoplasm and is the site where the polar bodies form. In mammals, the animal pole is also the site where the inner cell mass develops and gives rise to germ layers. Also called germinal pole. Compare vegetal pole. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| These cells then started to darken, losing their transparency (Figure 4A, B), and became located along the inner surface of the body wall; in contrast, cells in normal larvae retained their transparency and were located near the primary gut (archenteron), moving later through the blastocele to the animal pole (Figure 4C, F). 4) In the latter, Deleuze differentiates between these two concepts, which he refers respectively to "a vegetable or vegetative pole (permeation) and the animal pole (acting out)," and emphasizes the potential for violence that exists in both. |
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