Describe the filtration of lymph and indicate the pathway of filtration on your diagram.

Correct Answer: A

Rationale: Lymph enters via afferent vessels , flows into the subcapsular sinus , passes through paratrabecular to medullary sinuses , and exits via efferent vessels , filtering pathogens along the way.

Correct Answer: C

Rationale: Splenic cords (Billroth cords) lie between white pulp and blood sinusoids, containing lymphoid cells.

Correct Answer: A

Rationale: Thymus cortex contains lymphoblasts (immature) externally and mature T-lymphocytes internally.

Correct Answer: D

Rationale: Palatine tonsils have nodules and diffuse tissue ; they're in the oropharynx (not nasopharynx, A), non-keratinized , glands open at crypt surfaces (C is incorrect).

Correct Answer: C

Rationale: Goblet cells primarily produce mucus in the respiratory tract; they lack cilia , P450 enzymes , or surfactant (D, alveolar cells).