How does lymph travel from tissues back to the bloodstream according to the chapter?

Lymph travels from tissues back to the bloodstream by first entering lymph capillaries, where it is called lymph. It then filters through lymph nodes and is eventually returned to the venous system via the thoracic duct and the right lymphatic duct.

The lymphatic system plays a crucial role in returning excess interstitial fluid, initially formed as a blood filtrate, back to the bloodstream. This fluid enters lymph capillaries and becomes known as lymph. As lymph travels through the lymphatic system, it passes through lymph nodes, which contain phagocytic cells and germinal centers that produce lymphocytes. Finally, lymph is returned to the venous system through two major ducts: the thoracic duct and the right lymphatic duct, which connect to the subclavian veins.