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Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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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.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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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.

Communication by direct contact between cells. Communication by direct contact between cells.
Epiphyseal Usually occurs through the growth plate where the matrix is undergoing calcification and Epiphyseal Usually occurs through the growth plate where the matrix is undergoing calcification and
Replace the canister’s top (making sure it is tight) and connect its hose to the fuel rail ... Replace the canister’s top (making sure it is tight) and connect its hose to the fuel rail ...
White Blood Cells White Blood Cells
In oogenesis, cells enter meiosis as primary oocytes In oogenesis, cells enter meiosis as primary oocytes
Polytene chromosomes derived from larval salivary gland cells of Drosophila Polytene chromosomes derived from larval salivary gland cells of Drosophila
Video: Inflammatory response Animation

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