What is the main function of the heart?

• A. To pump blood throughout the body, delivering oxygen and nutrients to tissues
• B. To produce hormones that regulate metabolism
• C. To filter waste products from the blood
• D. To control voluntary muscle movements

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by identifying the primary role of the heart in the human body. The heart is a muscular organ that is part of the circulatory system.
2. Step 2: Understand the circulatory system's function. It is responsible for transporting blood, which carries oxygen, nutrients, and waste products, to and from tissues throughout the body.
3. Step 3: Compare the options provided in the question. The heart's main function is not related to producing hormones, filtering waste, or controlling voluntary muscle movements. These functions are performed by other organs such as the endocrine glands, kidneys, and the nervous system, respectively.
4. Step 4: Focus on the correct option: The heart pumps blood throughout the body, ensuring oxygen and nutrients are delivered to tissues and waste products are removed.
5. Step 5: Conclude that the heart's primary function aligns with the circulatory system's role, making the correct answer: 'To pump blood throughout the body, delivering oxygen and nutrients to tissues.'