When it comes to the ear, many people’s knowledge of it may be limited to the exposed auricle, the external ear canal that can be pulled out with a digging spoon, and the eardrum that can cause deafness if it rots. In fact, only know these, equivalent to you are still outside the gate of the scenic spot around! The inside of the ear is like a mysterious palace with a complex structure and many parts, so let me be your guide today and take a day trip to the ear palace. The outermost part of the ear is called the auricle, do not think that its role is only to provide you with services to help you hold the leg of the glasses, help you tighten the mask band, help you wear earrings beauty, in fact, the main role of people is to collect sound. Originally a vocal music teacher, it is to you as a physical education teacher for so many years, you say suffocating not suffocating? Okay, let’s go inside. The long corridor inside is called the external auditory canal, with hair on the outer skin and cerumen glands on the inner skin. The cerumen glands in the ear canal secrete cerumen with a special odor that keeps unwanted visitors such as small strong outside, and they are afraid to avoid this smell. The main role of the external ear canal is to transmit the sound waves collected by the auricle to the inside. Further ahead to the end of the corridor, we see an airtight glass door, which is our eardrum. In order to protect the inside, this door is always closed, even the water does not want to flow in. This door is a boundary, the outside part of the door is called the outer ear, the door is inside the middle ear. Into the middle ear inside you do not run around, this inside the organs can be more. Shh, don’t make any noise, there is a big snail with a strange temper lying deep in this room, it will make you deaf if it gets angry. Let’s go around first, and then visit it later. The middle ear of this room has six walls, the outer wall is a glass door, the inner wall is a large snail, the big brother upstairs is to look like a walnut, called the brain, love to take a bath every day, the home installed as a swimming pool, so do not stab the roof, or the palace will leak. The situation downstairs is more complicated, are important pipes and wires, there is a particularly thick natural gas pipeline called the internal carotid artery to go under the over, once the construction explosion, may have to life. Another thicker pipe immediately behind the natural gas pipe is the water pipe, where the water pipe makes a bend, and the bend is called the jugular bulb, which goes down to the internal jugular vein. Construction should also be careful of this pipe, once burst, is also extremely troublesome. Between these two pipes also go several cables, respectively, the linguopharyngeal nerve, the vagus nerve, the collateral nerve and the hypoglossal nerve, also very, very important. Come on, everyone follow me back, there is a step, everyone slow down, under the step walks the facial nerve. There is a small door called the entrance to the tympanic sinus, which is open all year round. After this small door and go back, it is clear that this slightly larger space is called the tympanic sinus, and further back is the mastoid process. The mastoid process is full of small holes like a beehive. In the back wall of the mastoid process is a very thick tube called the sigmoid sinus, which is connected to the jugular vein bulb below. The inner side of the sigmoid sinus is again at the border of the brain’s home. The mastoid and the external auditory canal share a common wall, and the anterior wall of the mastoid is the posterior wall of the external auditory canal. There is a very, very important cable called the facial nerve that goes down the steps just now to the bottom of this wall. Once this cable is out of order, we will have a crooked mouth and slanted eyes. Let’s go, let’s go back and go back to the middle ear hall. Going forward, there is a long passage called the eustachian tube, which leads to the back of the nose. Don’t think that the eardrum is impermeable and the middle ear is a closed space, but in fact many transactions are done through the eustachian tube, such as keeping the pressure exchange between the middle ear and the outside, such as transporting secretions from the middle ear out. So, when something goes wrong with this passage, trouble comes to the ear. After visiting the middle ear, now let’s look at the inner ear, which is this big snail. The snail’s head is called the vestibule, and it has three semicircular tentacles called semicircular canals, which are located in a plane perpendicular to each other, and they govern our balance. The snail is also attached to a chain (middle ear hearing bone chain) is attached to the glass door handle, so you do not see the snail sleeps in the house every day, in fact, what is happening outside, it hears everything, all the sound is reported to the snail through the chain attached to the glass door, the snail and then through the auditory nerve attached to its back to the sound to the brain brother, we will hear the sound. The external ear canal is blocked or the glass door is broken or the chain is broken, the snail’s ability is greatly reduced, but it can still feel part of the sound through the vibration of the bones. If the snail is broken, even if the external ear canal, glass door and chain are intact, we will not be able to hear.