What's the Difference Between Hemolymph and Hemocoel?

In an open circulatory system, the blood is not enclosed in the blood vessels but is pumped into a cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid. ... Most vertebrates and some invertebrates, like this annelid earthworm, have a closed circulatory system.

What is difference between hemolymph and blood?

The key difference between blood and hemolymph is that blood contains red blood cells, and it transports oxygen while hemolymph does not contain red blood cells and is not involved in oxygen transport. ... Blood is the fluid circulating in vertebrates while hemolymph is the fluid circulating in most invertebrates.

How does a hemocoel work?

When filled with fluid, the hemocoel expands against the body wall and fibrous tissues, providing a rigid framework and stretching opposing muscles. This same fluid pressure, generated by contraction of other muscles, allows the foot to extend from the shell and penetrate…