MICROANATOMY

Detailed explanation-1: -Answer and Explanation: The spleen does not form crypts that trap bacteria.

Detailed explanation-2: -Answer and Explanation: The spleen is located in the abdominal cavity, it serves as a reservoir of red blood cells, and a central artery goes through the white pulp. The only false statement about the spleen is c. The red pulp is also called splenic nodules.

Detailed explanation-3: -The tonsils, spleen, and lymph nodes are referred to as secondary lymphoid organs. These organs do not produce or mature lymphocytes. Instead, they filter lymph and store lymphocytes. It is in these secondary lymphoid organs that pathogens (or their antigens) activate lymphocytes and initiate adaptive immune responses.

Detailed explanation-4: -Tonsils lack a complete capsule. The epithelium overlying tonsils invaginates deeply into their interior to form crypts where bacteria and particulate matter are trapped to be destroyed in the lymphoid tissue of the tonsils.