Vegetative Pole
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
The vegetative pole, also known as the vegetal pole, is the region of an egg cell in embryology characterized by a greater accumulation of yolk and a smaller amount of protoplasm. It contrasts with the animal pole, which is richer in protoplasm and poorer in yolk. This distinction is especially pronounced in telolecithal vertebrate eggs.
Encyclopedia entry (1928–1936)
VEGETATIVE POLE (synonyms: vegetal pole), in embryology, that side of the egg cell in which there is a greater accumulation of yolk in the form of yolk platelets or spheres and a smaller amount of protoplasm, in contrast to the animal pole (see), which is less rich in yolk and richer in protoplasm. Among vertebrates, the vegetative pole is sharply expressed in telolecithal eggs with complete unequal cleavage (amphibians) or incomplete cleavage (fish, reptiles, birds).
Related articles
Mentioned in
Cite this page
“Vegetative Pole.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/vegetative-pole/