Which two diaphragms divide the insect hemocoel?

Which two diaphragms divide the insect hemocoel?

• A. Lateral diaphragm and medial diaphragm
• B. Anterior diaphragm and posterior diaphragm
• C. Dorsal diaphragm and ventral diaphragm
• D. Superior diaphragm and inferior diaphragm

Answer: (C)

Insects have an open circulatory system, and the hemocoel is the main body cavity filled with hemolymph. Two membranes run along opposite sides of the body—the dorsal and the ventral diaphragms. These diaphragms partition the hemocoel into dorsal and ventral compartments, helping organize how hemolymph flows around the heart and through the body. This orientation-based division (dorsal and ventral) matches the insect’s back-to-belly layout, rather than anterior/posterior or lateral divisions.

Insects have an open circulatory system, and the hemocoel is the main body cavity filled with hemolymph. Two membranes run along opposite sides of the body—the dorsal and the ventral diaphragms. These diaphragms partition the hemocoel into dorsal and ventral compartments, helping organize how hemolymph flows around the heart and through the body. This orientation-based division (dorsal and ventral) matches the insect’s back-to-belly layout, rather than anterior/posterior or lateral divisions.