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Did you know?

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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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Three types of aneurysms. Three types of aneurysms.
Children can fast map the meanings of words in a single exposure. Children can fast map the meanings of words in a single exposure.
Two common types of seed germination Two common types of seed germination
Identical twins (monozygotic twins) have the same sex and share a single genotype. Identical twins (monozygotic twins) have the same sex and share a single genotype.
Modern door design Modern door design
DNA replication DNA replication
Video: Summary of female reproductive cycle days 1-28

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