Reptiles
Kingdom : Animalia
Phylum: Chordata
SubPhylum: Vertebrata
Class: Reptilia
How Are They Different from Amphibians?
1. Heavier, bonier skeleton for support & travel out
of water
2. GOT Scales?!!!!!!
 tough, dry skin
 resists dehydration & injury
 need to molt/ shed to get bigger
3. Amniotic egg (oviparous)
 Has membranes to protect embryo &
food source(yolk)
 Supports embryonic dvlpmnt. w/o water
 Leathery shell (protection, anti-dehydration)
4.Jaws with teeth for crushing & gripping prey
(carnivorous lifestyle)
5. More efficient lungs than amphibians for
terrestrial life
6.Efficient circulation & higher BP (blood pressure)
 allows faster mvmnt.
 better predators than amphibians
7. Efficient strategies for water conservation
 Scales to prevent dehydration
 No urine, secrete uric acid but little water
8.
Nervous System more advanced
 Permits more complex behaviors than in
amphibians
 Keen senses to find prey
9. Reproduction
 Copulatory organ for internal
fertilization (land repro.)
 Repro. & excretory organs open into the
cloaca
Really Big Crocodile