Which of the following is the largest organ of the human body?

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

Answer: (D)

Verified step by step guidance

1. Understand the concept of an organ: In Anatomy & Physiology, an organ is a group of tissues that work together to perform specific functions. Examples include the liver, lungs, heart, and skin.
2. Recognize that the skin is classified as an organ: The skin is considered an organ because it consists of multiple tissue types (epithelial, connective, muscle, and nervous tissues) working together to protect the body and regulate various functions.
3. Compare the size of the listed organs: The liver, lungs, and heart are internal organs, but the skin covers the entire external surface of the body, making it the largest organ by area and weight.
4. Understand the functions of the skin: The skin plays a vital role in protection, temperature regulation, sensation, and synthesis of vitamin D, which highlights its importance as the largest organ.
5. Conclude that the skin is the largest organ: Based on its size, weight, and functions, the skin is the largest organ of the human body, surpassing the liver, lungs, and heart.