Learn some fascinating facts about the human body. Find out interesting details about the body, stomach, brain, eye, nose, heart, muscles and saliva.
1. The Body
The body is made of about 7 octillion atoms, which is made up of 7,000,000,000,000,000, 000,000,000,000 atoms. There are 37 trillion cells in your body. Four minutes after you die, your body starts to decompose by self digesting, where bacteria and enzymes eat away. Bacteria make up almost 5 lbs of the human body, 1 billion bacteria grow on each tooth.
Stomach acids are so strong that they can even dissolve metal.
All the folds in the human brain would stretch to form a pillowcase if they were opened up. The brain has trillion nerves which help in forming your memory. After seeing 2,500 images for only 3 seconds, participants in a study could recall if they had seen the images with 92 per cent accuracy. The DNA in the human body can be stretched out to about 10 billion miles, approximately the distance between Earth to Pluto and back. Any damage to brain cells cannot be repaired completely.
The human eye can distinguish between 2.3 and 7.5 million different colors, and an average human being spends 10 per cent of the day blinking. Cells in the inner lens of the eye will be the only cells that are not replaced throughout your life. Crying alleviates stress and allows humans to decrease feelings of anger and sadness.
The human nose can register between 1 trillion different smells. A person breathes in about 45 pounds of dust overall.
Your heart beats 100,000 times per day, pumping 5.5 litres per minute, which adds up to about 3 million litres of blood a year. A heartbeat is the sound produced by the closure of valves of the heart when the blood is pushed through its chamber. Yawning brings more oxygen to the lungs.
The human finger can feel a ridge as tiny as 13 nanometers in size, almost 7,500x smaller than the human hair. If the pinky finger was cut off, the hand loses almost 50 percent of its strength.
A human ear contains about 24,000 fibers in it. Earwax production is necessary for good ear health. After eating too much, your hearing is less sharp.
Beards are the fastest growing hairs on the human body. If the average man never trimmed his beard, it would grow to nearly 30 feet long in his lifetime. Curly hair comes out of an oval follicle. Children lose an average of 90 hairs per day, which increases to 120 by old age. The average human head has 100,000 hair follicles, each of which is capable of producing 20 individual hairs during a person’s lifetime. Blonds average 146,000 follicles. People with black hair tend to have about 110,000 follicles, while those with brown hair are right on.
Bone is stronger than some steel. Bones make up only 14% of our weight.
Depending on the area of the human body, the thickness of the skin varies from 1/2 to 6 mm. Each person sheds 22 kilograms of skin in his or her lifetime. People with dark color skin wrinkle later than people having light color skins.
Babies are born with pink lungs but they darken in color as we breathe in polluted air. Except the heart and lungs, all other parts of the body receive their blood supply from the largest artery of the body, the aorta. Our lungs inhale over two million liters of air every day, without even thinking. There are more than 300,000,000 capillaries in your lungs and if they were stretched out tip to tip they would reach approximately the distance between Atlanta and LA.
There is more bacteria in your mouth than the human population of the United States and Canada combined . Taste buds are present inside the mouth and also at the roof of the mouth. The gastrointestinal tract is a 30-foot (9 m) tube running from your mouth to your anus. The strongest muscles of the human body are masseters, which are present on either side of the mouth.
Brushing your teeth regularly has been shown to prevent heart disease. Enamel, found on our teeth, is the hardest substance in the human body. Human teeth are almost as hard as rocks. Plaque begins to form 6 hours after brushing our teeth.
Goose bumps on our skin are caused by pull of muscles attached to hair follicles and make the hair upright. Human speech is produced by the interaction of 72 muscles. Humans have more facial muscles than any other animal on earth – 22 on each side of the face.
Before their first birthday, average babies will have dribbled 255 pints of saliva. By the time they’re two years old, they will have crawled 93 miles. During your lifetime, you will produce enough saliva to fill two swimming pools. If saliva cannot dissolve something, you cannot taste it.
All the blood in our body passes 400 times through each kidney per day. Diabetes is the number one cause of kidney failure in the world. Besides this every year it is responsible for 5% or 5 million blindness in adults and one million limb amputations. Every day 440 Gallons of blood flows through each kidney. Human kidneys have about 1 million nephrons that filters out liquids and wastes. In a lifetime, the human kidneys clean over 1 million gallons of blood.