Question

Trace the movement of oxygenated blood in the body.

Answer 1

Oxygenated blood moves from the lungs to the left atrium (upper chamber of the heart on the left). The atrium has a thin wall. The blood is collected in the left atrium when the left atrium relaxes. As soon as the left atrium contracts, the left ventricle expands and blood is transferred to the left ventricle. Then, the left ventricle contracts and the blood is pumped to other parts of the body through the aortic arch.