Question

What animal has no hearts?

Answer 1

Animals with no hearts:

1. The coronary heart is a muscular organ that pumps blood via the blood vessels of the circulatory system.
2. It is generally present in almost all animals.
3. The heart helps the blood transport oxygen and nutrients to the body cells.
4. Some animals do not own a coronary heart.
5. These animals are so small that they may not be dependent on blood and nutrients pumped around to the inner organs.
6. Examples: jellyfish, flatworms, corals and polyps, starfish, sea anemone, sponges, sea cucumbers, and sea lilies.