The longest organ in the human body is the vagus nerve. It is a cranial nerve, also known as cranial nerve X, that plays a crucial role in controlling various bodily functions, including heart rate, digestion, and breathing.
The vagus nerve extends from the brainstem down to the abdomen, reaching a length of around 20 feet in adults. It's longer than any other organ, including the skin, intestines, or even the longest blood vessel.
