Question

Choose the correct answer from the alternatives given.
The exchange of materials between blood and interstitial fluid occurs only in:

• A. Capillaries
• B. Arteries
• C. Veins
• D. Arterioles

Answer 1

The correct option is A Capillaries

Capillaries are the smallest of a body's blood vessels, measuring 5-10 μm in diameter, which connect arterioles and venules, and enable the interchange of water, oxygen, carbon dioxide, and many other nutrients and waste chemical substances between blood and surrounding tissues.

So, the correct option is 'Capillaries'.