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Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

The central dogma of genetics at the molecular level. The central dogma of genetics at the molecular level.
A macromolecular machine: the transcription-initiation complex A macromolecular machine: the transcription-initiation complex
Reading and talking about a picture book is one effective way to improve children’s language ... Reading and talking about a picture book is one effective way to improve children’s language ...
Some playgrounds near streets with heavy traffic may still have high levels of lead from gasoline ... Some playgrounds near streets with heavy traffic may still have high levels of lead from gasoline ...
The pH scale is logarithmic. A low pH indicates acidic conditions, whereas a high pH indicates ... The pH scale is logarithmic. A low pH indicates acidic conditions, whereas a high pH indicates ...
ECG machine. ECG machine.
Video: Secondary Active Transport

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