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Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

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There are 20 feet of blood vessels in each square inch of human skin.

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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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Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

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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).

The structure of stomatal guard cells affects their function. The structure of stomatal guard cells affects their function.
Pacific hagfish resting on the ocean bottom, at 280 m depth off the Oregon coast. Pacific hagfish resting on the ocean bottom, at 280 m depth off the Oregon coast.
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Question 37 Part 2 Question 37 Part 2
Video: Hormonal regulation of pregnancy - week 1

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