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, [...]