Which of the following are the smallest blood vessels in the circulatory system?
a) aorta
b) vena cava
c) vein
d) capillaries
How many RBC/s can pass through capillary at a time?
a) only one
b) two
c) three
d) up to hundred
After releasing nutrients to the tissue, capillaries start to form ……..
a) aorta
b) vena cava
c) vein
d) venules
Which of the following bring blood vessels bring back blood to the heart?
a) lacteals
b) arteries
c) veins
d) capillaries
Explanation: all the veins transported deoxygenated blood except pulmonary vein which carry oxygenated blood from lungs to the heart after oxygenation
The walls of the veins are made up of …….layers.
a) two
b) three
c) four
d) five
Explanation: 1. Tunica externa
2. Tunica media (less elastic than artery) and 3. Tunica interna
