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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.