78. Long answer questions IX

 

b. The right atrium contracts, and the right ventricle relaxes. Thus, the deoxygenated blood from the right atrium is sent to the left atriumleft ventricleright ventriclelungs.

c. The right ventricle contracts, and blood enters the inferior vena cavasuperior vena cavapulmonary veinpulmonary artery. Through this, blood is pumped to the lungs for oxygenation. At the lungs, the exchange of gases takes place. The oxygen-rich blood is returned to the heart through the pulmonary veins.

d. The pulmonary veins carry the deoxygenated blood to the left atrium from the lungsoxygenated blood to the left atrium from the aortadeoxygenated blood to the left atrium from the aortaoxygenated blood to the left atrium from the lungs. The left atrium relaxes during the process to collect the oxygenated blood.

 

e. From the left atrium, the blood reaches the left ventricle due to the contraction of the left atrium. The left ventricle relaxes, and blood from the left atrium reaches the left ventricle.

 

f. The oxygenated blood is forced into the ventricle through the atrioventricular openings by the atrial contraction. Next, the left ventricle contracts and blood is pumped out to the various parts of the body through the aorta. Aorta is the largest artery present in the body, taking oxygenated blood to various organs and muscles.largest artery present in the body, taking deoxygenated blood to various organs and muscles.smallest artery present in the body, taking oxygenated blood to various organs and muscles.largest vein present in the body, taking deoxygenated blood to various organs and muscles..