body, organic structure, physical structure - the entire physical structure of an organism (especially an animal or human being); "he felt as if his whole body were on fire"

liver - large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes

ticker, heart, pump - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body; "he stood still, his heart thumping wildly"

bloodstream - the blood flowing through the circulatory system

lymph - a thin coagulable fluid (similar to plasma but) containing white blood cells (lymphocytes) and chyle; is conveyed to the blood stream by lymphatic vessels

blood vessel - a vessel in which blood circulates

vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood

venous blood system, venation - (zoology) the system of venous blood vessels in an animal

lymph gland, lymph node, node - the source of lymph and lymphocytes

vascular system - the vessels and tissue that carry or circulate fluids such as blood or lymph or sap through the body of an animal or plant

fetal circulation, foetal circulation - the system of blood vessels and structures through which blood moves in a fetus