|MadSci Network: Zoology|
Hi Asheley. Snakes are born with all the parts to their bodies. They have eyes, tongue, fangs, digestive organs.... and some have fangs and poison glands.
The snake parents have all the same parts and this is passed on by the genes.
The poison forms in the poison glands and is usually used to make the snake's prey stop moving so that they can eat it. Sometimes of course it is used to protect themselves.
The answer to your question is that the snake MAKES the poison and that's how it get into them!
Try the links in the MadSci Library for more information on Zoology.