Human Body — Page 3
The incredible human body
133 facts
AI has helped discover hidden human proteins and their functions.
A team of researchers used AI to identify human proteins that until now had no known function. Among them, TM184C…
The inner surface of human lungs, if stretched, would cover a tennis court.
The lungs contain about 300 million alveoli, small sacs where gas exchange takes place. If all were opened and…
Humans are slightly taller in the morning than at night.
During the day, gravity compresses the spinal discs, which lose water and become thinner. When sleeping lying down…
The human heart pumps about 7,500 litres of blood per day.
At rest, the heart beats between 60 and 100 times per minute and pushes about 70 millilitres of blood with each beat…
The tongue print is unique to each person, just like a fingerprint.
Like fingerprints, the pattern of papillae and grooves on the tongue is unique to each individual. No other person…
The human body loses about 600,000 skin particles every hour.
The skin constantly renews itself. Every hour, the human body releases about 600,000 dead skin particles. Over a…
The bone marrow produces about 2 million red blood cells per second.
The bone marrow in long bones continuously produces red blood cells to replace those that break down. Every second…
The liver is the only internal organ capable of fully regenerating itself.
The liver can regenerate even after losing up to 75 per cent of its tissue. The process occurs through the division…
The human brain is the organ with the highest percentage of fat in the body.
About 60 per cent of the human brain is made up of fat. It is the fattiest organ in the human body. Fat is essential…
Babies are born with about 300 bones, but adults have only 206.
Babies are born with about 300 bones, many of which are cartilage. During growth, some bones fuse together. That is…
The nails on the dominant hand grow faster than those on the other hand.
The nails on the dominant hand grow faster because that hand is used more often, which increases blood circulation…
The acid in the human stomach is capable of dissolving a metal blade.
The hydrochloric acid in the stomach has a pH between 1 and 2, strong enough to dissolve a razor blade in about 24…
The human body emits as much heat as a 100-watt incandescent bulb.
At rest, the human body produces about 100 watts of thermal power, equivalent to a 100-watt incandescent bulb. This…
Human venous blood is not blue, but dark red.
Venous blood is often depicted as blue in books, but it is actually dark red. The bluish colour we see in veins is…
The bone marrow produces about 500 billion blood cells per day.
The bone marrow produces about 500 billion blood cells per day, including red blood cells, white blood cells and…
Humans lose about 100 hairs per day.
Humans lose between 50 and 100 hairs per day, on average. Hair grows about 1.25 centimetres per month and each…
The spleen can be removed without the person dying.
The spleen plays a role in filtering blood and immune defence, but it can be surgically removed. After removal, the…
The gallbladder can be removed without serious consequences.
The gallbladder stores bile produced by the liver, but it can be surgically removed. After removal, the liver…
Humans have a vestigial bone called the tailbone.
The tailbone, or coccyx, is the vestige of a tail that our ancestors had. Although it no longer serves that purpose…
The human body contains enough phosphorus to make about 2,200 match heads.
The adult human body contains about 780 grams of phosphorus, most of it in bones and teeth. This amount would be…
The human body contains enough potassium to fire a toy cannon.
The adult human body contains about 140 grams of potassium, essential for muscle and nerve function. This amount…
The human body contains enough sulfur to kill all the fleas on a dog.
The adult human body contains about 140 grams of sulfur, present in amino acids such as cysteine and methionine. This…
There is a reflex that makes you sneeze when you look at the sun.
The photic sneeze reflex affects about 18 to 35 percent of people. When sunlight suddenly enters the eyes, the optic…
Collagen is the most abundant protein in the human body.
Collagen represents about 30 percent of all proteins in the human body and is the main component of skin, bones…
