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Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Aquatic microclimates: aquatic environments generally show less temperature variation compared to te Aquatic microclimates: aquatic environments generally show less temperature variation compared to te
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Posterior views of H. erectus, Neandertal, and modern H. sapiens show differences in vault shape. Posterior views of H. erectus, Neandertal, and modern H. sapiens show differences in vault shape.
Display Used by Murray, Boyaci, and Kersten (2006) Display Used by Murray, Boyaci, and Kersten (2006)
Display piece, Yoruba culture. Display piece, Yoruba culture.
A beam-type torque wrench that displays the torque reading on the face of the dial. The beam display ... A beam-type torque wrench that displays the torque reading on the face of the dial. The beam display ...
Video: Structures that affect circulation - heart and systolic/diastolic BP

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