- Most snakes are non-poisonous but some snakes as krait, cobra and viper are poisonous snake.
- Fangs are sharp, long, hollow or grooved teeth that are connected to a small sac in the snake’s head behind its eyes. These sacs produce a poisonous liquid called venom. For some snakes with really long fangs, the fangs will fold back into the mouth so they do not bite themselves.
- Snake venom may contain twenty or more toxins.
- The cobra and krait venoms are neurotoxic and cardiotoxic while the venom of viper is vasculotoxic and haemotoxic.
- The poison gland of snakes are homologous to the salivary glands of vertebrates.