Which of the following lists three primary functions that blood serves in the human body?

• A. Filtration, absorption, and secretion
• B. Digestion, excretion, and insulation
• C. Transport, regulation, and protection
• D. Respiration, locomotion, and reproduction

Answer: (C)

Verified step by step guidance

1. Understand the role of blood in the human body by identifying its primary functions. Blood is a connective tissue that performs essential tasks to maintain homeostasis.
2. Break down the three primary functions of blood: Transport, Regulation, and Protection. These functions are critical for the survival and proper functioning of the body.
3. For Transport: Blood carries oxygen from the lungs to tissues, carbon dioxide from tissues to the lungs, nutrients from the digestive system to cells, and waste products to excretory organs. It also transports hormones and other signaling molecules.
4. For Regulation: Blood helps regulate body temperature, pH levels, and water balance in tissues. This is achieved through its plasma and cellular components.
5. For Protection: Blood contains white blood cells and antibodies that defend against pathogens, as well as platelets and clotting factors that prevent excessive blood loss during injury.