Diagram of the Circulatory System in Invertebrates | Zoology

In this article we will discuss about the circulatory system in invertebrates with the help of suitable diagrams. The structures are somewhat different in different groups of invertebrates. A circula­tory system with distinct vessels is first met with in annelids. The skin, serves as the res­piratory structure and as a result the circula­tory system is simplified. A con­tractile dorsal vessel, [...]