With regard to the superficial cortex of the lymph node: It is supported by a reticular framework.

Correct Answer: A

Rationale: The superficial cortex is structurally supported by a reticular network.

Correct Answer: C

Rationale: Lymph nodes filter lymph , form lymphocytes , and mediate immunity ; RBC destruction and blood formation occur in the spleen.

Correct Answer: B

Rationale: Lingual tonsils are multiple masses at the tongue's base.

Correct Answer: C

Rationale: Lymphatic vessels have bicuspid valves, giving a beaded appearance ; they have thin walls and variable diameters.

Correct Answer: A

Rationale: T-cell receptors are exclusive to adaptive immunity (T cells); TLRs , mannose receptors , and complement receptors are on innate immune cells like macrophages.