The blood that runs through the veins, arteries, and capillaries is known as whole blood—a mixture of about 55% plasma and 45% blood cells. May 11, 2023 · The solid part of your blood contains red blood cells, white blood cells, and platelets. It’s made of plasma, red blood cells, white blood cells and platelets. The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs. Detailed information on blood, including components of blood, functions of blood cells and common blood tests. The body contains about 5 to 6 quarts (about 5 liters) of blood. Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells. 4 days ago · Drs. Dec 15, 2025 · Blood is a fluid that transports oxygen and nutrients to cells and carries away carbon dioxide and other waste products. Jan 16, 2024 · Blood circulates throughout the body, transporting substances essential to life.

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