Question

interstitial fluid that comprises the filtering and immune surveillance system is called
○ lymph.
○ humoral fluid.
○ plasma.
○ blood.
○ plasmin fluid.

Explanation:

To solve this, we analyze each option:

• Lymph: Interstitial fluid that enters lymphatic vessels, part of the lymphatic system (filtering/immune surveillance).
• Humoral fluid: Not a standard term for this system.
• Plasma: Liquid part of blood, not interstitial fluid.
• Blood: Contains cells and plasma, not just interstitial fluid.
• Plasmin fluid: Plasmin is an enzyme, not a fluid for this system.

So lymph matches the description.

Answer:

A. lymph.