what is the only part of the body that does not receive blood supply?

The only part of the human body that does not receive a blood supply is the cornea of the eye. Instead of blood vessels, the cornea gets oxygen directly from the air and nutrients by diffusion from the tear fluid on its outer surface and the aqueous humor inside the eye. This absence of blood vessels is crucial for maintaining the cornea's transparency, which is essential for vision. The cornea is also the fastest healing tissue in the body, often healing abrasions within 24 to 36 hours