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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
![The functional structure of the peripheral nervous system. (A) Afferent or sensory neurons carry sen](https://biology-forums.com/gallery/47/medium_14755_27_08_12_4_56_12_8219264.jpeg)
![The nervous system is described as having two interconnected divisions: the central nervous system (](https://biology-forums.com/gallery/47/medium_14755_07_10_12_3_19_30_9321293.jpeg)