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amniotic eggAn egg protected by a series of membranes: the amnion, which surrounds the embryo with a constant amniotic fluid environment; the allantois, which allows gas diffusion and waste removal; the yolk sac, [..]
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amniotic eggn. An egg that can be laid on land due to the presence of a fluid-filled amniotic sac (amnion) that cushions and protects the developing embryo. amniote - n. Any of a group of land-dwelling vertebrate [..]
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amniotic eggThe egg of reptiles, birds, and mammals. It possesses a series of extraembryonic membranes that help prevent desiccation, store wastes, and promote gas exchange. These adaptations allowed vertebrates to invade terrestrial habitats. amoeboid movement
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amniotic eggA shelled, water-retaining egg that enables reptiles, birds, and egg-laying mammals to complete their life cycles on dry land.
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amniotic egga shelled egg, with a large yolk and a number of shell membranes, which retains water and allows reptiles, birds, and egg-laying mammals to reproduce on land. Named for the amnion, the innermost shell [..]
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