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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.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.
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.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
![The greatest bone mass is found around age 30 for both men and women, with the later decline being f](https://biology-forums.com/gallery/47/medium_102911_16_06_15_7_18_43_220291584.jpeg)
![The end of a typical line wrench, which shows that it is capable of grasping most of the head of ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_35_58_29404901.png)