Blood is a complex mixture of
Red blood cells Red Blood Cells The main components of blood include Plasma Red blood cells White blood cells Platelets read more
(the oxygen-carrying component)White blood cells White Blood Cells The main components of blood include Plasma Red blood cells White blood cells Platelets read more
(the cells that defend against infection)Platelets Platelets The main components of blood include Plasma Red blood cells White blood cells Platelets read more
(particles that promote clotting)
The body contains about 5 to 6 quarts (about 5 liters) of blood. Once blood is pumped out of the heart, it takes 20 to 30 seconds to make a complete trip through the circulation and return to the heart.
Blood performs various essential functions as it circulates through the body. It delivers oxygen and essential nutrients (such as fats, sugars, minerals, and vitamins) to the body's tissues. It carries carbon dioxide to the lungs and other waste products to the kidneys for elimination from the body. It transports hormones (chemical messengers) to allow various parts of the body to communicate with each other. Also, it carries components that fight infection and stop bleeding.
