Question

atria looks darker than ventricles . why?

Answer 1

The left ventricle is the main pumping chamber of the heart. It is responsible for pumping blood through the entire body. The right ventricle only pumps blood into the lungs. Consequently the left ventricle is three times thicker in its musculature in the right ventricle. This tends to make the left ventricle which has oxygenated red blood in it more deeply red in its coloring. While the right ventricle has the Un- oxygenated blood which appears darker