What is the role of the lymphatic system?

The role of the lymphatic system is primarily to support immune function and maintain fluid balance in the body. This system consists of a network of lymphatic vessels, lymph nodes, and lymphoid organs that work together to transport lymph, a clear fluid containing immune cells, throughout the body.

In terms of immune function, the lymphatic system plays a crucial role in filtering out harmful substances, including pathogens and debris, through the lymph nodes. These nodes act as checkpoints where immune cells can detect and respond to infections, helping to activate the immune response when needed.

In addition to immune support, the lymphatic system is vital for fluid balance. It collects excess interstitial fluid that accumulates in tissues and returns it to the bloodstream, preventing edema (swelling) and ensuring that body fluids remain in equilibrium.

The other options do not accurately represent the main functions of the lymphatic system. While the digestive system involves the transport of nutrients, the regulation of body temperature is primarily managed by other systems, such as the integumentary and cardiovascular systems. Nervous system signaling is also facilitated by different mechanisms unrelated to the lymphatic system.