Question

Which animals don't have a heart?

Answer 1

Heart:

1. In most animals, the heart is a muscular organ.
2. Blood is pumped by this organ through the circulatory system's blood vessels.
3. There are many species that have no hearts at all, such as coral, sea cucumbers, starfish, flatworms, and nematodes.
4. Animals that can survive without a heart do not rely on blood being pumped to their internal organs in order to function.