poisonous snakes

how you know a snake is poisonous is if there pupals are strait down the center of there eyes like cats eyes. if a snakes pupals are a circle then there not poisonous. this is a picture of a poisonous snake if you see the pupals on the snake have a line in the middle of the eye.

snakes skin

the snakes skin has a layer of scale on top of the skin and on top of the scale is another layer of scales to protect the scales and the skin.