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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Variegated leaves caused by a mutation in cpDNA Variegated leaves caused by a mutation in cpDNA
Prolapsed uterus. (a) A prolapse is the abnormal drop of the uterus into the vagina, representing th Prolapsed uterus. (a) A prolapse is the abnormal drop of the uterus into the vagina, representing th
Components of a computer system. Components of a computer system.
Endocrine and nervous control of blood pressure. Endocrine and nervous control of blood pressure.
Endocrine System Endocrine System
Drawing of spirochete's mobility system (with internal flagellae). Drawing of spirochete's mobility system (with internal flagellae).
Video: Properties of water -structure of water and polarity (Ionized and polar compounds)

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