On average, a woman's brain makes up 2.5 percent of her body weight. A man's brain only contributes 2 percent of his body weight.
On average, people spend more than five years of their lives dreaming.
On average, the kidney of an adult weighs 5 ounces and processes around 425 gallons of blood a day.
When a person dies, hearing is generally the last sense to go. The first sense lost is usually sight. Then follows taste, smell, and touch.
When astronauts remain weightless in space for prolonged periods, scientists have discovered their bones lose a measurable amount of weight and thickness. This means that weightlessness actually cause human beings to shrink.
The human body has seven pairs of “true” ribs that are attached to the breastbone. It also has three pairs of “false” ribs that are attached to the rib above them and two pairs of “floating” ribs that are attached to the spine.
When people are relaxed, they inhale about 12 times every minute.
The human brain begins to lose cells at a rate of 50,000 per day by the age of 30.
When the female embryo is only six weeks old, it makes preparations for her motherhood by developing egg cells for future offspring. (When the baby girl is born, each of her ovaries carries about a million egg cells, all that she will ever have).
The human brain continues sending out electrical wave signals for up to 37 hours following death.
On the average, women dream more than men and children dream more than adults. Overall, more people dream in black-and-white than in color.
When walking, the weight of an average adult puts a downward pressure of 12,000 pounds per square inch on each thighbone. In this case, even the thinnest part of the thighbone, at 1-inch thick, bears the weight of a male African Elephant.
The human brain is 74 percent water.
One individual organ transplant donor can provide organs, bone, and tissue for 50 or more people in need.
When we smile broadly, we use seventeen muscles.
The human brain is capable of recording over 86 million bits of information daily.
One square inch of skin on the human hand contains some 72 feet of nerve fiber.
When you have a black eye, you have a bilateral periorbital hematoma.
The human brain is composed of more than 30 billion working parts, each one connecting with others--some as many as 60,000 times.
One-fourth of the 206 bones in the human body are located in the feet.
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