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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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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Paland and Lynch demonstrated the importance of sexual reproduction in reducing the frequency of mal Paland and Lynch demonstrated the importance of sexual reproduction in reducing the frequency of mal
Sexual Activity of Heterosexual Couples Sexual Activity of Heterosexual Couples
Masters and Johnson’s Four-Phase Model of the Sexual Response Cycle Masters and Johnson’s Four-Phase Model of the Sexual Response Cycle
The experience of romantic attachments is similar among sexual majority and minority youth. The experience of romantic attachments is similar among sexual majority and minority youth.
Lipids: Fats and Their Chemical Relatives Lipids: Fats and Their Chemical Relatives
Sexual Reproduction in Marchantia Sexual Reproduction in Marchantia
Video: Major Elements in Biological Molecules: Lipids

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