Do Nematodes Have a Circulatory System?

While nematodes have digestive, reproductive, nervous and excretory systems, they do not have discrete circulatory or respiratory systems.

What type of circulatory system is found in nematodes?

Nematodes are triploblastic protostomes with a complete digestive system. Roundworms have no circulatory or respiratory systems so they use diffusion to breathe and for circulation of substances around their body.

Do nematodes have hearts?

Complete digestive tract: Comparable to that of annelids, but nematodes show little or no specialization of different regions of the gut. No circulatory system: Nematodes don't have hearts, blood vessels, or blood. The fluid in the pseudocoel passively circulates nutrients and other substances throughout the body.