the worm especially earthworms
a worm is a exchanging oxygen and carbon dioxide
A worm can live underground even though it is an animal. The reason for this is because all of the oxygen,, food and moisture it needs is in the soil. And a worm is also an invertibrate.
One of the reasons worms are long are because of their general biological makeup. They have a very simple design lacking in lungs. They acquire their needed oxygen by diffusion through their skin. In order for a worm to acquire more oxygen a greater surface area is needed. This increased surface area can be accomplished by the worm being long and thin, but not by the worm being short and fat. it's an equation of surface area to volume. In being long and thin the oxygen can easily and rapidly diffuse across the worms membranes.
Feather duster worms have radioles that work like gills, exchanging carbon dioxide for oxygen in the water, allowing the worm to breathe.
Yes, earthworms can go underwater for several weeks with sufficient oxygen
The hearts that worm's have are very different from the heart's that humans have. The worm equivalent of a heart is called the aortic arch and does not contain chambers or valves, and does not get oxygen-rich blood to the lungs. The aortic arches simply pump blood throughout the worm's body.
Tubifex worms breathe through their soft, thin skin that can take in dissolved oxygen.
Earthworms, which are a type of segmented worm, help out plans by digging tunnels in the soil which gives plants oxygen.
Prevents the worm form dessication (drying out).
Through the skin. The oxygen goes directly through the skin to the bloodstream.But the skin must be moist in order for the oxygen to pass through.That's why the worms come out in rain.
i think it carries blood or oxygen to the brain