The Blood Introduction The body fluid, found in almost all multicellular fauna (animals, birds, reptiles, etc.), and responsible for transporting necessary substances such as oxygen and nutrients to different parts of the body, is known as blood. Blood is basically connective tissue in the liquid form. Blood is largely composed of blood cells and plasma. Plasma constitutes about 55 percent of blood fluid. The pH value of blood pH is ranging between 7.35 and 7.45, i.e. slightly basic. Plasma is mostly water (i.e. 92% by volume) and contains dissipated proteins, glucose, hormones, mineral ions, and carbon dioxide. The blood of vertebrate (animals) appears bright red when its hemoglobin is oxygenated; when it is deoxygenated, it (blood) appears dark red. The blood accounts about 7 percent of the human body weight. Functions of Blood Following are the significant functions of blood in the body − Transports oxygen to tissues and cells located in different parts of the body Supplies nutrient...