What is the largest organ and system in the human body?

What is the largest organ and system in the human body?

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

Answer: (B)

Skin is the largest organ, covering the entire body and accounting for a huge surface area. It also defines the integumentary system, which includes skin, hair, nails, and glands and serves as a protective barrier, helps regulate body temperature, enables sensation, and supports vitamin D production. The other options are large organs, but none match skin in overall size and mass. The liver is the largest internal organ by weight, while the heart and lungs are substantial but not larger than the skin when considering total body size. So, skin is the best answer because it is the body's largest organ and represents the largest system, the integumentary system.

Skin is the largest organ, covering the entire body and accounting for a huge surface area. It also defines the integumentary system, which includes skin, hair, nails, and glands and serves as a protective barrier, helps regulate body temperature, enables sensation, and supports vitamin D production. The other options are large organs, but none match skin in overall size and mass. The liver is the largest internal organ by weight, while the heart and lungs are substantial but not larger than the skin when considering total body size. So, skin is the best answer because it is the body's largest organ and represents the largest system, the integumentary system.