Question

Cornea transplant is almost never rejected. This is because

• A. its cells are least penetrable by bacteria
• B. it has no blood supply
• C. it is composed of nucleated cells
• D. it is non-living layer

Answer 1

The correct option is B it has no blood supply

Cornea is avascular, i.e. has no blood supply, therefore, cornea transplant in humans is almost never rejected. And it is avascular in order to be transparent so that we can see.
The cornea acts as the eye's outermost lens. It functions like a window that controls and focuses the entry of light into the eye.