Question

open circulation defination

Answer 1

those organism in which body fluid or blood directly bath the tissue and organs (lack of ventricles,vein, blood capillaries)
like insects

Answer 2

Open circulatory system pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by heart in body cavities, where tissues are surrounded by blood.

Mark as brainlist if you like answer.