Question

Trace the blood flow chamber, do not include heart valves
Start Pulmonary Capillary

End at right Kidney

Answer 1

In the pulmonary capillaries there is exchange of gases between the alveoli and the pulmonary capillaries. The deoxygenated blood which is brought by the pulmonary trunk from the right ventricle of the heart to the lungs is oxygenated. As the the alveoli has high concentration of oxygen due to inhalation of atmospheric air, the oxygen diffuses from the alveoli into the pulmonary capillaries.

From the pulmonary capillaries, oxygenated blood is carried to the left atrium of the heart through two pairs of pulmonary veins. From the left atrium, blood enters the left ventricle of the heart and from here it is pumped into the systemic circulation during ventricular contraction.

From the left ventricle, the blood enters the ascending aorta. From the ascending aorta, blood passes into the arch of aorta. Arch of aorta carries the blood into the left common carotid and left subclavian arteries as well into the right brachiocephalic trunk. Arch of aorta continues downwards carrying the blood into the descending thoracic aorta. From the descending thoracic aorta, blood flows into the abdominal aorta. Left and right renal arteries supply blood to the left and right kidney respectively. Renal arteries are direct branches of abdominal aorta. Thus, blood from the abdominal aorta passes into the left and right kidneys.