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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.