Which deep lymph node groups are commonly located within body cavities?

• A. Iliac and lumbar
• B. Bronchial, mediastinal and mesenteric
• C. Cervical, axillary, inguinal
• D. Popliteal and submandibular

Answer: (B)

The idea is identifying lymph node groups that are tucked inside body cavities rather than near the surface. Bronchial nodes sit around the bronchi in the lungs, and mediastinal nodes lie in the mediastinum within the thoracic cavity. Mesenteric nodes run in the mesentery of the intestines in the peritoneal (abdominal) cavity. These three form the classic set of deep, cavity-contained lymph nodes that monitor pathogens from internal organs.

Other options point to nodes that are superficial or located in regions not inside a body cavity, such as along the neck, armpit, groin, or near the jaw or knee. That’s why the trio of bronchial, mediastinal, and mesenteric nodes best fits the description.