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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.
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
![Apply oil or lotion across shoulders and to posterior neck. Turn the head to one side to access the ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_3_13_08_33146960.jpeg)
![Holding the head with one hand, apply effleurage to upper trapezius on one side using the fist. When ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_3_35_46_33151263.jpeg)