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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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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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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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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.

Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
Columbian Exchange Columbian Exchange
Fine motor skills involve coordinating the many small muscles of the wrists, hands, and fingers. Fine motor skills involve coordinating the many small muscles of the wrists, hands, and fingers.
Conduction and gas exchange structures and functions. Conduction and gas exchange structures and functions.
Exchange of gases between lungs and blood. High concentration of CO2 in blood capillary entering the ... Exchange of gases between lungs and blood. High concentration of CO2 in blood capillary entering the ...
Regeneration of EF-Tu–GTP by Tu–Ts exchange Regeneration of EF-Tu–GTP by Tu–Ts exchange
Video: Transcription—A molecular view

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