Amazing Facts about Five Sense Organs of Human Beings
Human ear has 3 bones which are so small that all three bones can be placed on a small coin.
Hearing is the fastest human sense. A person can recognize a sound in as little as 0.05 second.
Men can read smaller prints than women and women can hear and smell better than men.
Inner ear has direct connection with brain.
When we catch cold we lose our voice. This is because a tube called ‘Eustachian’ connects the middle ear to throat. This tube is responsible to bring equilibrium between atmospheric pressure and body pressure.
The reason why we get strange feeling in our ear or even slightly deaf when we are on high mountains is because the Eustachian tube fails to maintain equilibrium of pressure causing dizziness & ear pain.
Human ear functions even when we sleep.The ears always pick up sounds but brain blocks them.
Ear wax has antibacterial qualities. The ear’s design, combined with the act of chewing, helps to move the cerumen (ear wax) toward the outside of the ear. In this way, the ears are self-cleaning.
Despite its small size, the cochlea portion of our ear contains a large number of hair cells. These hair cells bend and have an important role to play in the amplification and transmission of sound to our brain.
Our ear plays an essential role in our sense of balance and equilibrium. Three semi-circular canals in the inner ear contain fluid that shifts when we tilt, move up and down or side to side. The shifting fluid triggers sensory hair cells that then send signals to brain about our movement and balance.
The reason why our nose gets runny when we are crying because the tears from the eyes drain into the nose.
The human eye can distinguish 500 shades of grey.
Women blink nearly twice as much as men.
The average blink is for about 0.3 seconds.
It is impossible to sneeze keeping our eyes open.
Eyes heal quickly. It takes about 2 to 3 days to repair an eye scratch.
Out of all the muscles in human body the muscles that control our eyes are most active.
So far, eye ball transplantation is not occurred. Because the optic nerve that connects eye to the brain is highly sensitive to reconstruct.
The cornea is the only organ in entire human body that has no blood supply. It gets oxygen directly from the blood. It is the fastest healing tissue in the body, can heal in 24 to 36 hrs.
All babies are color blind when they are born.
Lower and upper lateral cartilages positions and nasal bones define our nose shape.
Different people have different sneezing styles and these styles are genetically determined. So, the members of a family might have similar sneezing styles.
If we try to suppress a sneeze, we can rupture a blood vessel in the neck or head and die.
The highest recorded speed of a sneeze is 100 miles per hour. (165 km).
The best air filter in this world is human nose. Human nostrils are made up with hair responsible for blocking germs and dust.
Our nose regulates the temperature of the air we breathe.
In women, nose grows until the age of 15 to 17 and in men 17 to 19.
What we hear from when people speak or sing is largely related to resonating structures of throat and nose.The voice is produced in the larynx but that sound is ‘buzzing’. The richness of the sound is determined by how the sound is processed above the larynx, which occurs in the nose and throat.
Its not possible for humans to breathe and eat at the same time. But newly born can breathe and suckle breast milk at the same time. This is because newly born respiratory pathway is slightly different from older people.
Human can only smell 1/20th as well as a dog.
The average tongue is about 9 cm long.
Every one has unique tongue print, just like finger print.
There are approximately 9000 taste buds on the tongue.
Girls have more taste buds than boys.
Taste buds are replaced in every 10 to 14 days.
Close to 50% of bacteria in mouth lives on tongue.
The strongest muscle in human body is tongue.
Taste receptors cannot actually taste food until saliva moistens it. We usually taste salty things first as salt dissolves quickly in moisture.
Our tongue color can give hint to the doctor about our health. A bright-red color accompanied by fever and sore throat may be more serious.
Food in air plane is not very tasty because our sense of smell and taste decrease by 20 to 50% during flight.
The thickest portion of skin in human body is the skin at middle of the sole about 1.4mm deep.
The thinnest skin is found on eyelids that is 0.02mm thickness.
Human skin renews itself every 28 days.Skin is the largest organ of human body weighing about 15% of body weight.
An average human being has about 19 sq. ft. of skin and weighs about 9 pounds.
Skin contains more than 11 thousand miles of blood vessels.An average woman has 17 sq.ft.of skin. When a woman is in her ninth month pregnancy her skin will be 18.5 sq.ft.
People with darker skin will not wrinkle as fast as people with lighter skin.
Skin gets its color from a pigment called melanin. Skin color can range from very pale to very dark depending on how much melanin the body makes. The more malanin our body makes the darker our skin.
Breasts are a modified of apocrine sweat gland.
There are about five types of receptors in the skin that respond to pain and to touch.
The brain’s visual cortex in blind people is rewired to respond to stimuli received through touch and hearing so, they “see” the world by touch and sound.