What are the primary functions of blood?

What are the primary functions of blood?

• A. Transportation, Regulation, Protection
• B. Digestion and absorption
• C. Gas exchange
• D. Hormone production

Answer: (A)

Blood acts as the body's transportation, regulation, and protection system. It moves oxygen from the lungs to tissues and carbon dioxide back to the lungs for exhalation; it carries nutrients from the gut to cells and wastes to elimination; it also transports hormones to their target organs. It helps regulate temperature by distributing heat, maintains pH and fluid balance, and keeps osmotic stability through plasma proteins. It defends the body with immune cells and antibodies and seals wounds with clotting factors and platelets. Digestion and absorption occur in the digestive tract, gas exchange mainly happens in the lungs, and hormone production is done by endocrine glands (though hormones travel in the blood).

Blood acts as the body's transportation, regulation, and protection system. It moves oxygen from the lungs to tissues and carbon dioxide back to the lungs for exhalation; it carries nutrients from the gut to cells and wastes to elimination; it also transports hormones to their target organs. It helps regulate temperature by distributing heat, maintains pH and fluid balance, and keeps osmotic stability through plasma proteins. It defends the body with immune cells and antibodies and seals wounds with clotting factors and platelets. Digestion and absorption occur in the digestive tract, gas exchange mainly happens in the lungs, and hormone production is done by endocrine glands (though hormones travel in the blood).