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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
People about to have surgery must tell their health care providers about all supplements they take.
Blood is approximately twice as thick as water because of the cells and other components found in it.