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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.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Blood vessels: (A) normal artery, (B) constriction, and (C) arteriosclerosis and atherosclerosis. Blood vessels: (A) normal artery, (B) constriction, and (C) arteriosclerosis and atherosclerosis.
Comparison of normal and sickle cell red blood cells. Comparison of normal and sickle cell red blood cells.
Different parts of the body mature at different rates. “General” refers to the body as a whole: the Different parts of the body mature at different rates. “General” refers to the body as a whole: the
Levels of Ghrelin in Human Blood Plasma Levels of Ghrelin in Human Blood Plasma
Valves in veins open to permit blood flow, close to prevent backflow. Valves in veins open to permit blood flow, close to prevent backflow.
ABO blood type ABO blood type
Video: Protein catabolism - deamination

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