blood circulatory system diagram

August 03, 2026

General

Blood | Definition, Composition, Functions, & Facts | Britannica — Blood | Definition, Composition, Functions, & Facts | Britannica

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 of the body, and transports metabolic waste products away from those same cells. [1] Blood is composed of blood cells suspended in plasma. Blood is a liquid connective tissue made up of blood cells and plasma that circulate inside the blood vessels under the pumping action of the heart. In this week's episode, Blood editor Dr. James Griffin interviews Drs. Hanny Al-Samkari and Xin Zhou on their latest articles published in Blood. Blood is a fluid that transports oxygen and nutrients to cells and carries away carbon dioxide and other waste products. It contains specialized cells that serve particular functions. These cells are suspended in a liquid matrix known as plasma. Blood is a specialized fluid that constantly flows throughout your body. It’s made of plasma, red blood cells, white blood cells and platelets. For related background details, please refer to our report on 2002 buick century fuse box diagram. Blood is a connective tissue comprised of various components, each with its own unique structures and functions. The three main components of blood are red blood cells (RBCs), white blood cells (WBCs), and plasma. Composition of Blood and its functions 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. There are four components - or parts - of the blood: red blood cells, white blood cells, plasma and platelets. Blood carries things you need, like oxygen and glucose, and waste products, such as...