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Reptiles
• Body structure:
-
Skeleton almost entirely made of bone
Atlas and axis (first two parts cervical vertebrae) allow head to move more freely
Ribs fixed to the vertebrae
Covered in dry skin and scales
• Gas exchange through lungs, although some absorb oxygen and release
carbon dioxide using other parts of the body
• Ectothermic
• Internal fertilization
• Development:
-
External
Amniotic egg surrounded by a protective shell
Reptiles Cont.
• Heart:
- 3 or 4 chambered
- Two atriums, one ventricle
- Ventricle is seperated by an incomplete septum
- Left side of ventricle used for arterial blood
- Right side used for venous blood
- Mixture of oxygenized and deoxygenized blood in the ventricle.
•Subgroups
-Crocodilia: crocodiles, alligators, dinosaurs
-Sphenodonita: tuataras
-Squamata: snakes, lizards
-Testudines: tortoises,turtles
Works Cited
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http://www.coolcompanions.com.au/wp-content/uploads/2010/06/The-three-chambered-frog-heartmixes.jpg
http://www.webspawner.com/users/petcentralreptiles/
http://www.google.com/imgres?imgurl=http://3.bp.blogspot.com/_ETRtKue5_8Y/TBFecRjqIiI/AAAAAAAA
AGc/CvWjWKCJG7k/s1600/Reptiles04.jpg&imgrefurl=http://repmafe.blogspot.com/&usg=__rIL6P4Y5RYAt0nYCKJM_Xas9YxA=&h=450&w=67
6&sz=107&hl=en&start=0&sig2=TFTh1in2KrrK1vpXCDGtmA&zoom=1&tbnid=vRHJ9XaJ8mPxDM:&tbnh=1
40&tbnw=210&ei=fMijTffaDYfQgAfnvvDbCA&prev=/images%3Fq%3Dreptiles%26um%3D1%26hl%3Den%
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6&bih=667
http://www.google.com/imgres?imgurl=http://www.adventurelife.com/galapagos/images/Animals/giant_tortoise.jpg&imgrefurl=http://www.adventurelife.com/galapagos/galapagos-wildlife/galapagos-reptiles.php&usg=__YEJdSYT9wXMglIL67q3ALUNDRQ=&h=332&w=500&sz=17&hl=en&start=17&sig2=DfnjWROSmsnq43tFY2vkFQ&zoom=1&tbnid=PquDD7f
3CX0CLM:&tbnh=163&tbnw=235&ei=7sijTc7bDMjj0gGAlKHuCA&prev=/search%3Fq%3Dreptiles%26um%3
D1%26hl%3Den%26rlz%3D1G1SNNTCENUS421%26biw%3D1366%26bih%3D667%26tbm%3Disch0,483&u
m=1&itbs=1&iact=hc&vpx=828&vpy=198&dur=370&hovh=183&hovw=276&tx=201&ty=109&oei=fMijTffa
DYfQgAfnvvDbCA&page=2&ndsp=18&ved=1t:429,r:4,s:17&biw=1366&bih=667
http://thewondrous.com/wp-content/uploads/2009/09/Reptiles-And-Amphibians-18-600x400.jpg