Browsing: Blood

Blood is a vital fluid in the human body and most animals, responsible for transporting oxygen, nutrients, hormones, and waste products to and from cells and organs. Composed of red and white blood cells, platelets, and plasma, blood plays a central role in immune defense, clotting, and maintaining internal balance (homeostasis). Its complex cellular and chemical composition allows it to respond dynamically to infections, injuries, and physiological changes. In scientific research and medicine, blood is a key focus for diagnosing diseases, monitoring health, and developing treatments ranging from transfusions to gene therapies.