Human organs ear – The ear is an organ that is able to detect / recognize the sound and also plays a role in balance and body position. Vertebrate animals have ears on the same basis from fish to humans, with some variation according to the function and species. This writing will mainly discuss human ear.
Ear has three main parts so named outer ear, middle ear and inner ear.Outer ear consists of the ear, ear canal and the outer ear canal. Outer ear includes the ear or pinna, Liang ear or external auditory meatus, and the tympanic membrane or eardrum. The design is so complex in the outer ear serves to capture the most important part is the sound and the ear canal. This channel is the result of the composition of bone and cartilage covered with a thin skin. In the channel there are many glands that produce a waxy substance called cerumen, or earwax. Only the channels that produce little wax that has hair. At the end there is a channel that transmits the sounds of the eardrum to the inner ear.
The middle ear is an air cavity round the eardrum, which includes, 3 hearing bones (hammer or malleus, anvil or incus, and the stirrup or stapes). The tip of the Eustachian channel is also in the middle ear. Sound vibrations received by the eardrum will be submitted to the hearing bones. Each ossicular will deliver vibrations to the next bone. The stirrup bone is the smallest bone in the body transmit vibrations to the cochlea or the cochlea. In humans and other land animals, the middle ear and auditory canal will be filled with air under normal circumstances. Not like on the outside, the air in the middle ear is not associated with the air outside the body. Eustachian channel connecting the middle ear to the back room of the pharynx.
The inner ear of human organs ear consists of osea maze (maze bone), a series of cavities in the bone periosteum temples coated liquid-filled perilymph & membranasea maze, which lies deeper and has the endolymph fluid. In front of the cochlea or labyrinth are the cochlea. Cross section of the cochlea consists of three parts, namely vestibuli scale, medium scale, as well as the scale tympani. The base of the scale vestibuli related to the stapes through the webbed window casement called oval, while the tympanic scale associated with the middle ear through the round aperture. The top of the scale of media is restricted by the vestibular membrane or Reissner membrane and lower bound by the basilar membrane. At the top of the basilar membrane that functions contained organo corti turn sound vibrations into impulses. Organo corti composed of hair cells and cell backer. At the top of the hair cell tectorial membrane are gelatinous, flexible, whereas the hair cells will be connected to the brain by vestibulocochlear nerve. That explains Human organs ear.