Body Cavity: The presence or absence of a cavity between the body wall and the gut wall is a key factor in animal classification. COELOM: A body cavity that is fully lined by mesoderm. Coelomates: Animals that possess a true […]
Body Cavity: The presence or absence of a cavity between the body wall and the gut wall is a key factor in animal classification. COELOM: A body cavity that is fully lined by mesoderm. Coelomates: Animals that possess a true […]