Question

Choose the correct answer from the alternative given
Lymphatic ducts empty their contents into;
A. Large veins entering the right atrium
B. Pulmonary artery
C. Arteries going to the legs
D. Right ventricle directly

Answer 1

Hint: The lymphatic system is a network of vessels and nodes that accumulate and remove excess tissue fluid (lymph) before returning to venous circulation. It is a vital part of the body's immune defence.

Complete Answer:
Lymphatic vessels are transporting lymph fluid around the body. There are two main systems of lymphatic vessels – superficial and deep.
- The lymphatic drainage starts in the lymphatic canals, which begin as blind capillaries and eventually develop into vessels.
- These vessels fly approximately, draining through multiple lymph nodes. Eventually, the vessels drain into lymphatic trunks (also known as collecting vessels) – which eventually merge to form the right lymphatic duct and the thoracic duct.
- The lymphatic duct is a large lymphatic vessel that empties the lymph into one of the subclavian veins.
- The lymphatic duct of the right is responsible for draining the lymph from the upper right quadrant of the body. This covers the right side of the head and neck, the right side of the chest and the right side of the upper limb.
- The thoracic duct is much larger and drains the lymph out of the rest of the body. These two ducts are then drained into the venous circulation of the subclavian veins, through the right and left venous angles.
- Each of the lymph ducts has internal valves at its junction with the subclavian vein. These functions are identical to other lymphatic valves and prevent venous blood from flowing into the lymphatic duct. This point marks the end of lymph fluid 's journey through the lymphatic system.

The correct answer is option(A) Large veins entering into the right atrium.

Note: Two lymph ducts receive lymph nodes from the lymph nodes. They are the main lymph vessels which contain three layers, close to those of large veins. There are four pairs of lymphatic trunks:jugular lymphatic trunks, subclavian lymphatic trunks, bronchomediastinal lymphatic trunks, which are lumbar lymphatic trunks. The lymph intestinal trunk is, however, unpaired.
Chyle, a blend of intestinal emulsified fats and lymph fluid, is contained in the intestinal lymph trunk and the thoracic lymph duct.