IMMUNOLOGY

Detailed explanation-1: -It drains fluid (called lymph) that has leaked from the blood vessels into the tissues and empties it back into the bloodstream via the lymph nodes. The main roles of the lymphatic system include: managing the fluid levels in the body. reacting to bacteria.

Detailed explanation-2: -The lymphatic vessels drain into collecting ducts, which empty their contents into the two subclavian veins, located under the collarbones. These veins join to form the superior vena cava, the large vein that drains blood from the upper body into the heart.

Detailed explanation-3: -One of the lymphatic system’s primary jobs is to collect excess fluid (particularly lymph fluid) surrounding the body’s tissues and organs and return it to the bloodstream. If the lymphatic system didn’t drain excess fluid from the tissues, the lymph fluid would build up in the body and cause swelling.

Detailed explanation-4: -The lymphatic system has three primary functions. First of all, it returns excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 percent is returned. The 10 percent that does not return becomes part of the interstitial fluid that surrounds the tissue cells.

Detailed explanation-5: -The junction where the lymphatic ducts and subclavian veins meet is the only direct connection between the blood and lymph circulatory systems, and thus the only point where lymph can enter the blood circulation.