Quick Facts

· Sound travels through the air into your ear allowing you to hear.
· When sounds go into the ear they are transferred to the eardrum and the eardrum will vibrate.
· After the sound has reached the eardrum it goes through all the parts of your ear to the brain.
· In the entire human body the smallest bone is inside the ear.
· Inside your ear are hair cells that turn sound waves into nerve signals.
· Loud noises and sounds can puncture your middle ear.
· If enough of your eardrum or cells are damaged then you could lose your hearing.
· The three semicircular canals in your ear help you keep your balance. In the ear the Eustachian tube leads to your throat.
· Our outer ear is designed to capture passing sounds and vibration waves.
· A human can’t hear the loud squeaky or low sounds that dogs can.

Fun Facts

· Did you know you have a snail in your ear? Inside the ear is a spiral shape that is filled with fluid. It is called the Cochlea. The word Cochlea means snail in Latin.
· Inside the ear is an Eustachian tube that is attached to the back of your nose. The word Eustachian tube was named after an Italian anatomist, Bartolomeo Eustachio.
· The sound waves in the air travel 1 mile in five seconds.
· Did you know that earwax isn’t made of the dust and germs in your ear? The glands in your ear make the earwax that keep the dust and germs from getting in. So if you clean your ears don’t over do it because the wax is there for a reason.
· When you talk the sound waves travel through the bones in your skull.
· Some dogs can hear better than humans.
· Sounds travel about four times faster in water than in the air!
· A human ear is on the head, but a cricket’s ear is below its knees.
· A cat has more muscles in their ears than a human. They have 23 muscles in each ear!
· A dog can hear a sound from 250 yards away. Most humans can’t hear beyond 25 yards. A dog can hear a frequencies up to 30 000 times a second. A human can hear frequencies of about 20 000 times a second.

Hearing By Brittanie

My Defense

The function of the ear is to hear, a sound will come into your ear and make your eardrums and ear bones shake. Those vibrations are picked up by nerves and sent back to the brain. The brain tells you what you are hearing.

Anvil (it is also called a incus) is a tiny bone in the ear that passes the vibrations you hear from the hammer to the stirrup.

Hammer (it can also be called a malleus) is a tiny bone that passes the vibrations that you are hearing to the eardrum to the anvil.

Eustachian Tube is a tube that is attached to the very middle of your ear and to the back of your nose. The tube blocks the pressure from the middle of your ear and the air that is outside. Basically its when your ears pop because your ears are changing altitude. So when you are one a plane you are blocking the pressure in the middle of your ears.

Eardrum, which is also called a tympanic membrane .It, is a thin membrane that starts to vibrate when a sound or vibration waves reach it.
Membrane Cell membrane, it is a cell.

Cochlea Is a structure inside the ear that is filled with fluid. It is shaped like a spiral. The cochlea lines up with the cilia, which are little hairs when the vibration of sound and causes a nerve to impulse to it’s form.
Nerves The nerves that are in your ears carry electro-chemical signals from the cochlea into the brain.
Outer Ear Canal Which is the tube that transfers sounds into the eardrum.

Pinna (it can also be called the auricle) which is the part of the ear that you can see (outer ear). The pinna collects all the sound that you are hearing and directs the sounds to the outer ear canal.

Semicircular Canals They are three loops of fluid tubes that are connected to the cochlea inside the ear. They help us keep our sense of balance.

Stirrup (it can also be called the stapes) which is a little bone in the ear that is shaped like the letter U. It passes the vibrations from the stirrup to the cochlea. This U- shaped bone is that smallest bone in the human body, it is 0.25 to 0.33 cm in length.

The ear interacts with the brain, the ear will pick up the sounds or vibrations that you are hearing and send it to the brain through the Cochlea. The Eustachian Tube connects to the nose from the back of your ear.