Question

Do worms have lungs?

Answer 1

Explanation:

1. Earthworms have no lungs and breathe through their skin,
2. To allow dissolved oxygen to get into their bloodstream, their skin must remain moist.
3. Earthworms have mucus-coated skin and require a damp, humid environment to survive
4. They take in oxygen through their skin and exhale it through their mouths. Because air dissolves in their skin's mucus, they must maintain a constant level of moisture in order to breathe. Suffocation occurs when worms dry out.
5. Oxygen is pulled into the worm's circulatory system as fresh air is inhaled through the skin, and the worm's hearts pump oxygenated blood to the head area.