Are arthropods capable of coelom?

Arthropods, like annelids and worms, are coelomates. They have a true coelom or body cavity. However, arthropods have a coelom that is smaller than the area surrounding the reproductive or excretory organs. These blood-filled areas are the primary body cavities of arthropods.

Therefore, are arthropods Deuterostomes then?

Arthropods, Mollusks, and Annelids are all protostomes. Deuterostomes can include complex animals like chordates, but also simple animals like echinoderms.

Are Arthropods also known to have organ systems? The internal structure of Arthropods is also segmented. Nervous, muscular, circulatory and excretory systems all have repeat components. The arthropods are a descendant of an animal lineage that has a coelom. This is a cavity that forms between the gut membrane and the body wall, which houses the internal organs.

It is also important to understand why the Coelom of arthropods is reduced.

Blood is found in the body cavity, or coelom for arthropods/molluscs. The haemocoel (an enlarged blastocoel) greatly lowers the coelom . This is only for the cavities of the excretory and gonad organs. Hydrostatic skeleton can be created by the haemocoel.

Are arthropods capable of having hearts?

Yes, they do. But their hearts are different from ours. As with all arthropods insects have a closed circulatory system. While our blood is contained within blood vessels, hemolymph (or insect blood) flows freely throughout the body.

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