Since the cornea doesn't have any blood vessels the body's immune system is less likely to detect the foreign graft, and therefore, rejection is unlikely (although possible).

For the same reason, the lack of blood vessels that carry oxygen and nutrients will greatly slow the healing process. That is why this transplant can take so long to heal. For most people, it can take between 6 to 12 weeks to fully recover from the surgery.

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2 years ago

The buffalo was the primary source of food shelter clothing and tools for native Americans of the

borishaifa [10]

Answer:

The Plains Indians

Explanation:

Indian tribes from the Plains region used buffalo for shelter, food, clothing, and artworks. These Indian tribes include Comanche, Arapaho, Kiowa, Cheyenne, Blackfoot Crow, Lakota, etc. American Indian tribes survived on hunting and gathering practices in the Great Plains. They follow buffalo herds (bison) which allow them to travel from one area to another. They live in tipis made of hides of bison which protect them from winter and rains.

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2 years ago