Which phrase best describes a function of blood?

• A. Generating action potentials to coordinate skeletal muscle contraction
• B. Producing digestive enzymes to break down food in the small intestine
• C. Transporting oxygen, nutrients, hormones, and metabolic wastes throughout the body
• D. Providing the primary site of gas exchange between air and tissues

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the primary functions of blood in the human body. Blood is a connective tissue responsible for transporting various substances.
2. Step 2: Recognize that blood carries oxygen from the lungs to body tissues and returns carbon dioxide from tissues to the lungs for exhalation.
3. Step 3: Identify that blood transports nutrients absorbed from the digestive system to cells throughout the body, as well as hormones secreted by endocrine glands to target organs.
4. Step 4: Note that blood also carries metabolic wastes from cells to excretory organs like the kidneys for elimination.
5. Step 5: Compare the given options and conclude that the phrase describing blood's function as transporting oxygen, nutrients, hormones, and metabolic wastes best matches its physiological role.