Question

How is lymphatic drainage divided superior vs inferior to the pectinate line?

a) Superficial vs deep lymphatic drainage
b) Internal vs external lymphatic drainage
c) Inguinal vs iliac lymphatic drainage
d) Thoracic vs abdominal lymphatic drainage

Answer 1

The lymphatic drainage superior to the pectinate line is divided into superficial and deep lymphatics that merge into larger trunks.

Step-by-step explanation:

The lymphatic system is divided into superior and inferior drainage based on the path of lymph fluid. Superior to the pectinate line, the superficial and deep lymphatics merge to form larger lymphatic trunks. On the right side of the body, the right subclavian vein receives lymph from the right head, thorax, and upper limb via the right lymphatic duct. On the left side, the rest of the body drains into the larger thoracic duct which enters the left subclavian vein. The superficial lymphatics generally follow the same routes as veins, while the deep lymphatics follow the paths of arteries.