ANATOMY

Detailed explanation-1: -The left and right sides of the heart work in unison. The atria and ventricles contract and relax in turn, producing a rhythmic heartbeat. The right side of the heart receives deoxygenated blood and sends it to the lungs. The left side of the heart receives blood from the lungs and pumps it to the rest of the body.

Detailed explanation-2: -While it is convenient to describe the flow of blood through the right side of the heart and then through the left side, it is important to realize that both atria and ventricles contract at the same time. The heart works as two pumps, one on the right and one on the left, working simultaneously.

Detailed explanation-3: -The correct answer: The sequences of contraction of the heart chamber is c. both atria followed by both ventricles. The contraction of the heart chambers takes place according to the specific cardiac cycle. At first, both atria contract which results in the movement of the blood to the ventricles.

Detailed explanation-4: -The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles. The left ventricle is the largest and strongest chamber in your heart.

Detailed explanation-5: -The oxygenated blood returns to the heart via the pulmonary veins and enters the left atrium. The left atrium contracts and pumps the blood through the mitral valve into the left ventricle. Finally, the left ventricle contracts and pushes the blood into the aorta.