What is the largest organ of a horse's body?

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

Answer: (A)

The skin is the largest organ because it forms the outer covering of the whole horse, wrapping every part of the body and containing a vast amount of tissue, glands, hair, nerves, and connective layers. This extensive surface and integrated structure means the skin accounts for more of the body’s tissue than any other single organ, even though other internal organs like the heart or liver are also large. In grooming, this makes skin health a top priority: look for signs of irritation, sores, parasites, rashes, or sunburn, and maintain the coat’s condition to support the horse’s temperature regulation and overall well-being.