Which organ is the largest body organ?

Which organ is the largest body organ?

• A. The liver
• B. The brain
• C. The heart
• D. The skin

Answer: (D)

Think about size in terms of coverage and surface area. The skin is the body's largest organ because it covers the entire external surface, creating a vast available area for its many roles. Its surface area is roughly 1.5 to 2 square meters, and it serves as a protective barrier, helps regulate temperature and fluid balance, enables sensation, and participates in vitamin D production. While internal organs like the liver are very large in mass, the skin’s extensive coverage makes it the largest overall organ.

Think about size in terms of coverage and surface area. The skin is the body's largest organ because it covers the entire external surface, creating a vast available area for its many roles. Its surface area is roughly 1.5 to 2 square meters, and it serves as a protective barrier, helps regulate temperature and fluid balance, enables sensation, and participates in vitamin D production. While internal organs like the liver are very large in mass, the skin’s extensive coverage makes it the largest overall organ.