The lymphatic system serves multiple essential functions in the body, primarily involved in immune response and fluid balance. It transports lymph, a fluid containing infection-fighting white blood cells, throughout the body, helping to defend against pathogens. Additionally, the lymphatic system maintains fluid homeostasis by draining excess interstitial fluid and returning it to the bloodstream. It also plays a role in the absorption of fatty acids and fats from the digestive system. Overall, the lymphatic system is vital for maintaining health and preventing disease.