Chapter 20

18 terms by ghero96

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Amniotic egg

egg composed of shell and membranes that create a protected environment in which the embryo can develop out of the water


outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)


thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)


vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (reptiles, birds and mammals)


a simple water-soluble protein found in many animal tissues and liquids


a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves


tortoises and turtles


shell covering the back (of a turtle, tortoise, crab, etc.)


(zoology) the part of a turtle's shell forming its underside


true lizards




crocodiles and alligators

vertical fracture plane



inactivity resulting from torpidity and lack of vigor or energy


solitary individuals come together to prevent heat loss


an elaborate and remarkable display on a lavish scale

Jacobson's organ

Sense organ on snake's roof of mouth which detects airborne chemicals

pit organs

A sensory organ between the eye and nostrils

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