Image Based Question-66742

Identify the Histology slide shown in the image.

A. Tonsil

B. Tongue

C. Liver

D. Lymph node

Correct Answer » D Explanation

Ans:D.)Lymph Node.

Normal lymph node histology

• Lymph nodes are oval masses surrounded by a fibrous capsule and divided by septa.
• The capsule is reached by afferent lymphatic ducts that carry the lymph flowing in the sub capsular sinus toward the peripheral sinus.
• Lymph nodes are anatomically and functionally composed of three distinct areas: the cortex, paracortex and medulla.
• The cortex is a B-cell dependent area containing primary and secondary follicles.
• The paracortex surrounds the follicles and is interposed between the cortex and the medulla; it is a T-cell depending area, formed by small lymphocytes.
• The medulla is the place of the sinus where the lymph is conveyed toward efferent lymphatic ducts and is a B dependent area; the medulla contains macrophages, plasma cells and lymphocytes.