GROSS ANATOMY

Detailed explanation-1: -The left atrium receives blood from the lungs. This blood is rich in oxygen. The left ventricle pumps the blood from the left atrium out to the body, supplying all organs with oxygen-rich blood.

Detailed explanation-2: -The right atrium receives deoxygenated blood from systemic veins; the left atrium receives oxygenated blood from the pulmonary veins.

Detailed explanation-3: -Statement 1 : Atria receives blood from all parts of the body which subsequently flows to ventricles. Statement 2 : Action potential generated at sino-atrial node passes from atria to ventricles.

Detailed explanation-4: -Left atrium: one of the four chambers of the heart. The left atrium receives blood full of oxygen from the lungs and then empties the blood into the left ventricle.

Detailed explanation-5: -The right coronary artery provides blood to the right atrium and parts of both ventricles. The marginal arteries branch from the right coronary artery and provide blood to the surface of the right atrium.