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Lizards are scaly reptiles, having two pairs of limbs and an elongated body, with a long, tapering tail, frequently twice as long as the rest of the body.

Lizard

Lizards are scaly reptiles, having two pairs of limbs and an elongated body, with a long, tapering tail,…

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

Rattlesnake

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

Structure of internal anatomy of a snake.

Snake

Structure of internal anatomy of a snake.