ORDERS: 1._______________________ 2. ________________________
3. ___________________
1. First vertebrates to move to _____________. Freshwater or ___________________.
2. ____________ present in tadpole stage, ______________ present in some adults or _____________________.
3. Skin is __________, ___________________, & _____________ & is used for __________________.
4. ________________ feet. Toes are soft & lack ___________________. ___________ skeleton.
5. Larval form (tadpoles) are ___________________ while adults are _______________________.
6. Larval form has a ______ chambered heart. Adults have a _______ chambered heart. Amphibians are ______________. Their body temperature varies with the environmental temperature.
7. ____________________ fertilization. Numerous eggs laid in watery environments.
8. ____________________________ occurs during development. ( limbs develop, tail disappears, gills are replaced by lungs).
9. ___________________ during winter.
10. ______________ large with small teeth in upper jaws (vomerine teeth). Two _______________ open into oral cavity.
11. _____________ present � exit for digestive & reproductive systems.
ORDER APODA � caecilians � body ____________ no limbs or girdles
ORDER URODELA � salamanders & newts � 2 pairs of ________ limbs
ORDER ANURA � frogs & toads � head & trunk fused � 2 pairs of ______________ limbs
CLASS: _________________
ORDERS: 1. _________________________ 2. ________________________
3. ______________________ 4. ________________________
1. _________________ or semiaquatic.
2. Body covered with ______________ - prevents loss of moisture. Skin shed through _______________.
3. Limbs, if present, with _________ on toes for climbing, digging, & moving on land. ______________ appendages.
4. Well-developed _____________.
5. Partial division of the heart _____________.
6. Ectothermic.
7. ______________________ eggs with a leathery, protective shell � allows reproduction without a dependence on water.
Layers of egg include : ______________ - surrounds the embryo � filled with fluid
______________ - forms a container for stored food called the yolk
______________ - stores nitrogen wastes
______________ - lines the eggshell; responsible with the allantois for respiration
___________________ fertilization.
8. _________ skeleton.
9. Respiration by ____________.
10. _________________ present � removal of wastes & eggs.
ORDER CHELONIA � _____________________________ - body encased in a shell � dorsal _____________ joined with the ventral flattened ________________ - shell fused with ribs & thoracic vertebrae � jaws with _________________ - no teeth � oviparous
ORDER RHYNCHOCEPHALIA ��snout head� - __________________ - primitive lizard-like species � New Zealand � row of short spines on the back � median pineal ______ - practically extinct
ORDER SQUAMATA - ___________________ - body covered with plates � scales on belly in ___________ pattern in lizards, in _________________________ in snakes � pelvic girdle present in pythons - ______________ bone movable in both lizards & snakes
ORDER CROCODILIA - ___________________________________ - bony plates in the skin - ____ digits on forelimbs, ____ on hindlimbs � strong __________ for swimming - _______ chambered heart