Question

Select the incorrect statements with respect to blood vessels.

1. Capillaries are thin-walled having a single layer of ciliated epithelium.
2. Arteries are pulsatile and devoid of valves.
3. Portal vein starts as capillaries from one organ and ends as capillaries in another organ.
4. All arteries carry oxygenated blood whereas all veins carry deoxygenated blood.
5. Capillary walls bear fenestrae through which WBCs can move out by diapedesis.

Choose the correct answer from the options given below:

विकल्प

• I and IV

• I and V

• I, II and III

• III, IV and V

Answer 1

I and IV

Explanation:

• Statements I and IV about blood vessels can be modified because capillaries have a thin wall and only one layer of squamous epithelium.
• All arteries carry oxygenated blood, with the exception of the pulmonary artery. Similar to veins, all veins transport deoxygenated blood, with the exception of the pulmonary vein, which transports oxygenated blood from the lungs to the left atrium.