Do insects have a circulatory system?
Hemolymph: Hemolymph is the blood of cockroaches composed of colorless plasma and many corpuscles called hemocytes.
The circulatory system in insects:
Do Humans Have a Closed Circulatory System?
Do Flatworms have a closed circulatory system?
Do annelids have a closed circulatory system?
Why do humans have a closed circulatory system?