would like to use this literature to my friend, I wish you all a happy Christmas and healthy New Year!
- West Wood Dr.
Human Mathematics
Westwood Dr.
The human body by more than 100 trillion cells, the body's largest organ is the skin, with a total area of about 2 square meters.
The heart, weighing about 260 grams, the volume of 750 ml, each time in the contraction of intravascular injection into the blood to 70 ml of blood per minute row 5,000 ml, 24 hours a spray of blood sent to 7500 kilograms. The heart beat per minute, 60 ~ 100 times. Beating a person's life is about 300 million times.
Normal blood volume accounts for 8% of body weight, that is, weight 50 kg person, approximately 4 kg (equivalent to 4000 milliliters) of blood. Ten months of the baby about 300 ~ 500 ml of blood.
Blood vessels, including arteries, veins and capillaries, with a total length of about 10 million km, can be two laps around the earth and a half.
Lungs, weighing about 1000 ~ 1300 grams, normal minute ventilation volume 4200 ~ 6600 milliliters.
Person's life about 10 to 15 tons of food, 50 ~ 80 tons of water through the stomach processing and handling.
Some body needs 10 vitamins, 10 of several minerals, eight kinds of essential amino acids and two essential fatty acids.
The liver, weighing 1300 grams, is the largest body of digestive gland, liver cells, secretion of 100 ml of bile per day, can silently over the conduct of more than 500 kinds of chemical reactions. Therefore, the liver was known as the body's largest chemical plants.
The body water balance of the Kingdom of the important devices - the kidneys, two total weight of about 300 grams, from more than 400 million basic parts - renal units, within the tubules and the length of its approximately 50 ~ 60 mm, near the micro-tube villi a total area of 50 ~ 60 square meters. There were about 1,200 milliliters of blood per minute through the two kidneys, about 27 minutes to be able to systemic blood filtration again, it should not "exit" of nutrients come back again the waste discharge. Normal two kidney per minute, about 120 ~ 140 milliliters of the original urine production, originally produced for each 24-hour urine volume of 180 liters, of which 99% is absorbed, and absorption of 1% of the final urine, about 1.5 liters. Urine by 25 cm-long sewer visited the reservoir --- --- ureter bladder. If the accumulation of 400 ~ 500 ml, there was intended to produce urine. The headquarters of the brain agree --- the reservoir will be automatically placed gates, bladder capacity in general to 1000 ml of water --- through the urethra, eliminated from the body.
Endocrine community, the thyroid gland, weighing about 25 grams, the "iodine library," said, which contains 500 micrograms of iodine, accounting for 90% of the body content; adrenal weight 10 grams; ovary weighs about 6 grams; pituitary gland is only 0.6 grams ; the smallest parathyroid gland is only 0.13 grams; has a dual role of the pancreas, re-66 ~ 100 grams, containing 100 to 2 million islets, the cell number of 500 million to 100 million or so. It emotions will have significant implications on human blood sugar. The endocrine glands secrete substances called hormones, which not only regulate growth and development of the body metabolism, but also lead to gender-root.
More than 206 bones and 600 muscles constitute the human body, stand on the important internal organs of protection, support and motor function. Whole body bone, weighing about 9 kg, representing weight of 1 / 5 to 1 / 7.
Eyes like an exotic camera, it can distinguish between the spectrum of 150 colors, which contains 12 million rod cells and 6.5 million cones; ear drum, its surface area of 50 ~ 90 mm2; nose be able to smell out the more than 2000 kinds of different scents, the sense of smell receptors --- olfactory epithelium of the surface area of 500 millimeters squared.
The diameter of a human hair is 105! 200 microns, their life is four years or so, healthy people a day off 40 ~ 50, of course, there are new growth, root hair every day approximately 0.4 mm long. Beard, male-specific characteristics of the second, a total of 2000 ~ 3000.
The body of the Kingdom of the Supreme Headquarters by Brother 6, namely the brain, cerebellum, midbrain, diencephalon, pons, medulla oblongata, referred to as the brain, a total weight of 1300 ~ 1500 grams, the volume is 1600 cubic centimeters, containing 14 billion neurons and more than 9,000 million glial cells.
The human body has about 5,000 more enzyme (enzyme), in which more than 3,000 gut.
Person's lungs more than one million TB, gut more than 400 types of bacteria, the total number of hundreds of millions of bacteria.
Normal human cells mature in about 25 years old, people's normal life span of between 120-150 or more.
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