Question

The main collecting duct of the lymphatic system, the thoracic duct, receives lymph from the

• A. left side of the head, neck, chest, left upper extremity and the left side of the body below the ribs
• B. right side of the head, neck, chest, left upper extremity and the right side of body below the ribs
• C. right side of head, neck, chest, left upper extremity and the entire body below the ribs
• D. left side of the head, neck, chest, left upper extremity and the entire body below the ribs

Answer 1

Answer: (D)

As the blood passes through the capillaries some amount of it oozes out in the surrounding tissues. This is known as tissue fluid or interstitial fluid. When this fluid enters the lymphatic system it is known as lymph. Lymph is a colorless fluid as it lacks haemoglobin. It contains cells known as Lymphocytes which is important for immune system. The Lymphatic system consists of lymphatic capillaries, nodes, vessels and ducts. The lymphatic capillaries join to form lymphatic vessels. Large lymphatic vessels finally pour into one of the two principal vessels: Thoracic duct or Right Lymphatic duct. The thoracic duct receives lymph from the entire left side of the body.