Which organ is the largest in the body?

• A. Brain
• B. Liver
• C. Skin
• D. Heart

Answer: (C)

The skin is considered the largest organ in the human body. It serves multiple vital functions, including protection, regulation, and sensation. Covering the entire external surface, it plays a critical role in shielding underlying tissues from mechanical damage, pathogens, and harmful environmental factors such as UV radiation. Additionally, the skin helps regulate body temperature through sweat production and blood vessel dilation or constriction and is involved in the synthesis of vitamin D upon exposure to sunlight.

In terms of size, the skin can weigh about 8 to 10 pounds and cover an area of approximately 20 square feet in adults, making it significantly larger than other organs such as the brain, liver, or heart. Each of these organs plays crucial roles in bodily functions but does not compare to the overall surface area and weight of the skin, which is integral to maintaining homeostasis and overall health.