Which cells are elevated in parasitic infections?

Correct Answer: C

Rationale: Eosinophils rise in parasitic infections; neutrophils fight bacteria, lymphocytes are adaptive, macrophages are broad.

Correct Answer: B

Rationale: Lymphocytes rise in viral infections; neutrophils are bacterial, eosinophils are parasites, basophils are allergies.

Correct Answer: A

Rationale: The thymus is a primary lymphoid organ where T-cells mature through antigen-independent differentiation . It has a connective tissue capsule with trabeculae forming lobules , a cortex with densely packed thymocytes, and a medulla with Hassall's corpuscles (C, D), supported by epithelioreticular cells.

Correct Answer: B

Rationale: Lymphangitis is inflammation of lymph vessels, appearing as red lines; lymphadenitis is lymph node inflammation, lymphedema is swelling.

Correct Answer: D

Rationale: White pulp is round/oval, has four zones (including PALS), and a central arteriole.