CLASS:  ________________________ 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