The lymphatic trunks that do not drain into the thoracic duct are the lymphatic vessels that drain the right upper limb, the right chest, and the right head, and their lymphatic reflux enters the right lymphatic duct. The body’s lymphatic system drains 10% of the intertissue fluid and some of the macromolecules that enter the blood system through all levels of lymphatic structures. Lymphatic reflux throughout the body enters the bloodstream through just two large lymphatic vessels, the thoracic duct and the right lymphatic conduit. The thoracic duct is the largest lymphatic conduit and drains most of the lymphatic return of the whole body from the lower extremities, abdomen, pelvis, left upper extremity, left chest, left head and neck, and finally injects into the left subclavian vein. Lymphatic reflux that is not injected into the thoracic duct is injected into the right lymphatic duct, which drains lymphatic reflux from the right upper extremity, right chest, and right head.