Ihmiskorva

ihmiskorva refers to the human ear, a sensory organ responsible for hearing and balance. It is a complex structure divided into three main parts: the outer ear, the middle ear, and the inner ear.

The outer ear consists of the auricle (pinna) and the ear canal. The auricle collects sound waves and directs them into the ear canal, which amplifies them and channels them towards the eardrum.

The middle ear begins at the eardrum, a thin membrane that vibrates when struck by sound waves. These vibrations are then transmitted to three small bones, the malleus, incus, and stapes, collectively known as the ossicles. The ossicles amplify the vibrations and pass them to the oval window, an opening to the inner ear.

The inner ear contains the cochlea, a spiral-shaped structure filled with fluid. Within the cochlea are tiny hair cells that convert the mechanical vibrations into electrical signals. These signals are then sent to the brain via the auditory nerve, where they are interpreted as sound. The inner ear also houses the vestibular system, which is crucial for maintaining balance and spatial orientation. This system includes the semicircular canals and the vestibule, which detect head movements and position.