A transplanted cornea of eye is rarely rejected. Why?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Cornea**: The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. It plays a crucial role in focusing vision.

2. **Lack of Blood Supply**: The cornea does not have a direct blood supply. This is significant because blood carries immune cells, including lymphocytes, which are responsible for the rejection of foreign tissues.

3. **Immune Response**: In most organ transplants, the immune system recognizes the transplanted tissue as foreign and mounts an immune response against it. This response is primarily mediated by lymphocytes.

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