GENERAL HISTOLOGY

Detailed explanation-1: -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-2: -Collecting ducts: Lymphatic vessels empty the lymph into the right lymphatic duct and left lymphatic duct (also called the thoracic duct). These ducts connect to the subclavian vein, which returns lymph to your bloodstream. The subclavian vein runs below your collarbone.

Detailed explanation-3: -As the interstitial fluid accumulates, it is picked by the tiny capillary lymphatics, passes through the lymph nodes, and finally returns the fluid to the venous circulation. As the lymph passes through the lymph nodes, both monocytes and lymphocytes enter it.