520 likes | 657 Vues
Blood is a vital connective tissue composed of plasma and cellular elements, including red blood cells (RBC), white blood cells (WBC), and platelets. In humans, blood volume typically ranges from 5-6 liters in males and 4-5 liters in females. It maintains a slightly alkaline pH of approximately 7.4. Blood's color varies from bright red to dark red, depending on oxygen levels. This unique tissue plays crucial roles in transporting nutrients, oxygen, and waste, as well as in immune response and clotting.
E N D