What is the only part of the body with no blood supply?

What is the only part of the body with no blood supply?

What is the only part of the body with no blood supply?
The only part of the body with no blood supply is Cornea.
The cornea, a transparent and dome-shaped structure covering the front of the eye, is unique because it has no blood supply. This feature is crucial for maintaining its transparency and allowing light to pass through unobstructed, which is essential for clear vision. Unlike other tissues in the body that rely on blood vessels to deliver nutrients and oxygen, the cornea receives these vital substances from the tear fluid on its outer surface and the aqueous humor, a clear fluid in the chamber of the eye behind it.

This avascular nature of the cornea prevents blood vessels from obstructing light, ensuring that it remains clear and able to focus light properly onto the retina. The structure of the cornea is meticulously designed to support its function. It consists of five layers, each playing a role in maintaining its health and transparency. The outermost layer, the epithelium, acts as a protective barrier against dust, bacteria, and other harmful particles. The stroma, making up about 90% of the cornea’s thickness, provides structural support and clarity. The innermost layer, the endothelium, helps to keep the cornea clear by pumping out excess fluid.

One of the remarkable aspects of the cornea is its ability to heal itself from minor injuries. However, its lack of blood supply means that more severe damage can be challenging to repair, sometimes requiring medical intervention such as a corneal transplant. Despite this, the cornea’s avascular nature is a fascinating adaptation that ensures we can see the world around us with sharp and clear vision.