Help with Primary Lymphoid Organ Physiology

The lymphatic system is part of the circulatory system and carries fluid called lymph, via lymphatic vessels, toward the heart. The lymphatic system functions to remove interstitial fluid from tissues, transport lipids as chyle from the digestive system, and defend the body against infection and the spread of tumors.

The circulatory system transports oxygen and nutrients to body tissues. Most nutrients are absorbed directly into the blood from the small intestine. Fats are the exception, and are transported into the lymph via lacteals.