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Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
Did you know?
The average adult has about 21 square feet of skin.
Did you know?
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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![Schematic representation of MHC class I molecule, consisting of 3 α domains and 1 β2-microglobulin ...](https://biology-forums.com/gallery/31/medium_398119_11_07_17_4_50_36_315051108.jpeg)