What is the largest organ/system of the body?

• A. Integumentary system
• B. Digestive system
• C. Nervous system
• D. Circulatory system

Answer: (A)

The main idea is recognizing which organ covers and weighs the most in the body. The skin, as part of the integumentary system, is the body's largest organ by both surface area and weight. It wraps the entire exterior, forming a protective barrier, helping regulate temperature, and preventing water loss, among other roles. Because the skin spans the whole body, it surpasses every other organ in size, making the integumentary system the largest organ system overall.

It’s worth noting that if you asked for the largest internal organ, that distinction would go to the liver, but the question here refers to the largest organ/system of the body in general, which is the skin and the integumentary system.