Question

1. b and t cells spend most of their time in the ______. a. bloodstream b. lymphatic system c. heart chambers d. capillaries

Explanation:

B and T - cells are lymphocytes involved in the immune response. They circulate and are mainly found in the lymphatic system, which is a major site for immune - cell activation and interaction. The bloodstream is also a pathway for them but not their main residence. Heart chambers and capillaries are parts of the circulatory system and not the primary location for B and T - cells.

Answer:

b. Lymphatic system