Blood is a specialized form of connective tissue and 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. Plasma, which constitutes 55% of blood fluid, is mostly. The meaning of BLOOD is the fluid that circulates in the heart, arteries, capillaries, and veins of a vertebrate animal carrying nourishment and oxygen to and bringing away waste products from all parts of the body. How to use blood in a sentence. 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. Blood Basics Blood is a specialized body fluid. 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. 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 living tissue that circulates through the body’s blood vessels, carrying oxygen, nutrients, hormones, heat, and chemical signals while removing waste products. Although it looks like a single red liquid, blood is actually a mixture of plasma and specialized blood cells and cell fragments. In a healthy adult, blood is roughly half plasma and half cellular components. Each part has. Blood, the journal of the American Society of Hematology, publishes cutting-edge research and clinical advances in hematology and oncology. Blood is a specialized fluid that constantly flows throughout your body. It’s made of plasma, red blood cells, white blood cells and platelets. Blood Basics Blood is a specialized body fluid. 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. An average-sized man has about 12 pints of blood in his body, and. Blood Components: Red Cells, White Cells, Platelets, and Plasma Explained A complete guide to the four main blood components — what they are, what they do, and why each is essential to survival. Includes counts, lifespans, and clinical roles.