In which body system do lymphatic vessels play a critical role?

Lymphatic vessels are integral to the circulatory system because they are a vital component of the lymphatic system, which is closely associated with the circulatory system. The lymphatic system is responsible for transporting lymph, a clear fluid that contains infection-fighting white blood cells, throughout the body. This system plays a crucial role in maintaining fluid balance by returning excess interstitial fluid to the bloodstream, thereby preventing edema.

Additionally, lymphatic vessels help in the absorption of fats and fat-soluble vitamins from the digestive system and transport these nutrients into the bloodstream. They also facilitate the immune response by transporting lymphocytes and other immune cells to areas of infection or inflammation. This interaction with both the circulatory system and the immune response underscores the importance of lymphatic vessels in overall body function.