Question

Label the parts from A -F in the given diagram

• A. A - Valves, B -Capsule, C- Efferent vessel , D - Immune cells, E - Cortex , F - Afferent vessel
• B. A - Valves, B -Capsule, C- Afferent vessel , D - Immune cells, E - Cortex , F - Efferent vessel
• C. A - Valves, B -Capsule, C- Efferent vessel , D - Cortex, E - Immune cells , F - Afferent vessel
• D. A - Valves, B -Capsule, C- Efferent vessel , D - Immune cells, E - Medulla , F - Afferent vessel

Answer 1

The correct option is A A - Valves, B -Capsule, C- Efferent vessel , D - Immune cells, E - Cortex , F - Afferent vessel

Lymph nodes are very important parts of the immune system harbouring many immune cells that clear pathogens which drain in alongwith the lymph.The outermost covering of the lymph node is a tough layer called the capsule. The capsule has extensions which divides the cortex into many compartments. There are many afferent vessels that bring lymph into the lymph nodes. Valves present in the afferent vessels prevent lymph from flowing back. As the lymph reaches the lymph node carrying pathogens and cell debri, they are cleared by macrophages and other immune cells present in the lymph node. The lymph free of all pathogens is returned to circulation via the efferent lymph vessel.