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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Some male birds and mammals congregate in communal courting grounds called leks. Some male birds and mammals congregate in communal courting grounds called leks.
The breeding and wintering grounds of the American redstart, Setophaga ruticilla. The breeding and wintering grounds of the American redstart, Setophaga ruticilla.
Many salmon spawning grounds, such as the Little Qualicum River in British Columbia, consist of wate Many salmon spawning grounds, such as the Little Qualicum River in British Columbia, consist of wate
Examples of Medical Necessity Criteria Examples of Medical Necessity Criteria
Video: Olfaction. or the sense of smell

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