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Blood - Wikipedia 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 [1] Blood is composed of blood cells suspended in blood plasma
Blood: Function, What It Is Why We Need It - Cleveland Clinic Blood has four parts: Red blood cells, white blood cells, platelets and plasma Each part has specific and important tasks, from carrying oxygen to carrying out waste products Your blood also acts like a kind of health barometer
Blood Basics - Hematology. org It has four main components: plasma, red blood cells, white blood cells, and platelets 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 About 7% to 8% of your total body weight is blood
How Blood Works - HowStuffWorks Blood is a mixture of two components: cells and plasma The heart pumps blood through the arteries, capillaries and veins to provide oxygen and nutrients to every cell of the body The blood also carries away waste products