What do the vessels in the lymphatic system provide?

The lymphatic system plays a crucial role in the immune response, which is why the vessels within this system are integral for defense against infection. Lymphatic vessels transport lymph, a fluid that originates from interstitial fluid and contains white blood cells, particularly lymphocytes. These white blood cells are essential for identifying and combating pathogens, such as bacteria and viruses.

When the body is exposed to an infection, lymphatic vessels help to filter the lymph through lymph nodes, where lymphocytes can engage with and eliminate pathogens. Moreover, the lymphatic system helps to maintain fluid balance within tissues by collecting excess interstitial fluid and returning it to the bloodstream, which indirectly supports immune function. By facilitating the movement of immune cells and the absorption of some fat-soluble nutrients, the lymphatic vessels contribute to the overall defense mechanism of the body against infections and diseases.