What Is Blood
What is Blood. Blood is essential to life. Blood circulates through our body and delivers essential substances like oxygen and nutrients to the body’s cells. It also transports metabolic waste products away from those same cells. There is no substitute for blood. It cannot be made or manufactured.
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. In vertebrates, it is composed of blood cells suspended in blood plasma.
Kids Definition of blood. 1 : the red fluid that circulates in the heart, arteries, capillaries, and veins of persons and animals and that brings nourishment and oxygen to and carries away waste products from all parts of the body.