Question
Biology Question on human health and disease
Cornea transplant in humans is almost never rejected. This is because
A
it is composed of enucleated cells
B
it is a non-living layer
C
its cells are least penetrable by bacteria
D
it has no blood supply
Answer
it has no blood supply
Explanation
Solution
Cornea is a transparent layer of tissue continuous with sclerotic that forms the front part of vertebrate eye over the iris and lens. It refracts light waves entering the eye onto lens. Cornea is avascular (i.e., has no blood supply). It is one of the first organs to be successfully transplanted because it lacks blood vessels.