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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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Anterior and posterior views of the body illustrating the location of various body regions.
Visible Views of Saturn
Spiral Galaxies (Nearly Face-on Views)
Primary visual processing areas (blue) in (a) human (lateral and mesial views) and (b) chimpanzee.
W. A. Rogers’s engraving, “Out of the Game,” showed one injured boy tending to another. It appeared
Cutaway views of (a) the breast of a woman who is not pregnant and (b) the breast of a lactating wom