Human Circulatory System

Q.

Which blood vessel has the largest amount of urea?

1. Dorsal aorta

2. Renal vein

3. Hepatic vein

4. Hepatic portal vein

Q. The given figure shows the schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function?

1. C - vena cava - takes blood from body parts to the right auricle, Pco2 = 45 mm Hg
2. D - Dorsal aorta -takes blood from heart to body parts, Po2 = 95 mm Hg
3. A - Pulmonary vein - takes impure blood from body parts, Po2 = 60 mm Hg
4. B - Pulmonary artery - takes blood from heart to lungs, Po2 = 90 mm Hg

Q. Choose the correct answer from the alternatives given.
Lymphatic ducts empty their contents into;

1. large veins entering the right atrium
2. pulmonary artery
3. arteries going to the legs
4. right ventricle directly

Q. Blood pressure in the pulmonary artery is:

1. Same as that in the aorta
2. more than that in the carotid
3. more than that in the pulmonary vein
4. less than that in the venae cavae

Q.

Which blood vessel has the largest amount of urea?

1. Renal vein

2. Hepatic vein

3. Hepatic portal vein

4. Dorsal aorta

Q. The hexacanth of taenia reaches the heart of the pig through this vein

1. Renal vein
2. Precaval vein
3. Post-caval vein
4. Hepatic vein