👉 The term "isocardia" refers to a type of cardiac muscle that is composed primarily of smooth muscle cells. Isocardial muscle is responsible for contracting and relaxing the heart, which is essential for blood flow regulation in the body. In humans, isocardial muscle is found mainly in the left atrium and ventricle, while it is absent or weak in other parts of the body. Isocardial muscles are also involved in the contraction of blood vessels called arterioles, which
