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Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Brain mass as a function of body mass in mammals. Brain mass as a function of body mass in mammals.
Lions mating in Ngorongoro Conservation Area, Tanzania Lions mating in Ngorongoro Conservation Area, Tanzania
Female cheetah and cubs in the Ngorongoro Conservation Area Female cheetah and cubs in the Ngorongoro Conservation Area
A plaque is a clear area in which all bacteria have been lysed by phages A plaque is a clear area in which all bacteria have been lysed by phages
The mole fraction of oxygen in dry air near sea level is 0.20948, where the molar mass of ... The mole fraction of oxygen in dry air near sea level is 0.20948, where the molar mass of ...
Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ... Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ...
Video: The Pressure Flow Model in a Plant

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