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People Trivia

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The lymphatic system helps the body fight disease by circulating lymph fluid to the lymphatic ducts.

The medical term for the hip or hip joint is the coxa coxae for more than one.

The mineral calcium prevents or helps alleviate muscle cramps.

The mineral content, porosity, and general makeup of human bone is nearly identical to some species of South Pacific coral. The two are so alike that plastic surgeons are using the coral to replace lost human bone in facial reconstructions.

The most essential minerals to the human body are: salt for maintaining water levels, iron for red blood cells, and calcium for bones.

The most obese people in the world are in Russia, at 25.4 percent, followed by Mexico, at 25.1 percent. Obesity is defined as 30 pounds or more over a healthy weight.

The muscles in the human body are 75 percent water.

The National Institute of Mental Health places fear of flying (aerophobia), second only to fear of public speaking.

The nose cleans, warms, and humidifies over 500 cubic feet of air every day.

The number of centenarians 100 years and older has more than doubled since 1980 to about 50,000. Four in five were women.

The older a person gets the less sleep he/she requires. A child should get from 8 to 10 hours a night. An elderly adult can do well with 4 to 6 hours.

A buccula is a little-used term for a person's double chin.

A child weighs about 300 million times more when it is born than it did when its independent cellular life began.

A contracting muscle can shorten to almost half its original length.

A fetus in the womb can hear. Tests have shown that fetuses respond to various sounds just as vigorously as they respond to pressures and internal sensations.

A four-month-old fetus will startle and turn away if a bright light is flashed on its mother's belly. Babies in the womb will also react to sudden loud noises, even if their mother's ears are muffled.

A healthy man who is good physical shape has about 12 to 15 percent body fat. A woman in good shape has between 15 to 18 percent. The models used in most of the advertising for abdominal machines, on the other hand, have less than 10 percent body fat.

A human can detect one drop of perfume diffused throughout a three-room apartment.

A human can detect the wing of a bee falling on his or her cheek from a height of one centimeter.

A human can hear the tick of a watch from 6 meters in very quiet conditions.

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