Question

What type of circulation is found in hemichordate?

Answer 1

Hemichordate:

1. Hemichordate is a phylum of deuterostome animals.
2. Hemichordates are marine, colonial, and mostly tubicolous.
3. Their body is soft, vermiform, and fragile.
4. The body of hemichordates is divided into proboscis, trunk, and collar.
5. The circulatory system in hemichordates is simple with an open type.
6. The blood vascular system includes a dorsal heart with two longitudinal vessels.
7. In this type of circulation, blood is not confined to blood vessels.
8. This open type of circulation is less efficient.
9. It is found in leeches, prawns, and insects.
10. Examples: Balanoglossus gigas, Saccoglossus bromophenolosus.