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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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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.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Chromosomes Chromosomes
Independent assortment of chromosomes at meiosis explains Mendel’s ratio Independent assortment of chromosomes at meiosis explains Mendel’s ratio
Opener Chromosomes in the prometaphase stage of mitosis Opener Chromosomes in the prometaphase stage of mitosis
Interphase Chromosomes are extended and uncoiled, forming chromatin Interphase Chromosomes are extended and uncoiled, forming chromatin
Genes, Chromosomes, and Meiosis Genes, Chromosomes, and Meiosis
Transient pairing of X chromosomes Transient pairing of X chromosomes
Video: Cavernous Sinus Larynx Middle Ear Orbit: Granulesm Animation

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