Ihmiskorvassa

Ihmiskorvassa refers to the human ear in Finnish. The human ear is a sensory organ responsible for hearing and maintaining 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 visible part, the auricle or pinna, and the ear canal. The auricle collects sound waves and directs them into the ear canal, which leads to the eardrum. The eardrum is a thin membrane that vibrates when sound waves strike it.

The middle ear begins with the eardrum and contains three small bones known as ossicles: the malleus, incus, and stapes. These bones transmit and amplify the vibrations from the eardrum to the inner ear. The middle ear is an air-filled cavity connected to the nasopharynx by the Eustachian tube, which equalizes pressure.

The inner ear is responsible for both hearing and balance. It contains the cochlea, a spiral-shaped organ filled with fluid and tiny hair cells. Vibrations from the middle ear cause the fluid in the cochlea to move, stimulating the hair cells. These hair cells convert the mechanical vibrations into electrical signals that are sent to the brain via the auditory nerve, where they are interpreted as sound. The inner ear also houses the semicircular canals and the vestibule, which are crucial for sensing head movements and maintaining balance. Disorders affecting any part of the ihmiskorvassa can lead to hearing loss, tinnitus, or balance problems.