+ Essay/Term paper: Zoology report on reptiles
Essay, term paper, research paper: Biology
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A. Adaptations: enabled them to live their entire life without water.
1) lungs - most have 2 but snakes have 1 which fits neatly into its slender body
* How canthey breathe while eating then??
a special tube in the mouth that extends outside the snake's mouth while swallowing so doesn't suffocate
2) scaly skin
a. dry and leathery
b. advantage: helps prevent loss of water in dry environment
3) toes, claws, suction cups - help climb and dig (some are legless Ex. snakes)
4) amniotic egg
a. do not need water for development
b. creates a protected environment for the embryo
c. parts:
1. Amnion - membrane enclosing the salty fluid in which the embryo floats
2. Yolk Sac - encloses the yolk which is rich in nutrients and nourishes the embryo
3. Allantois - stores waste
4. Chorion - lines the outer shell, encloses the embryo and other membranes - also aids in gas exchange between egg and outside environment
5. Leathery Shell - waterproof but porous
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