Gehörgang

Gehörgang refers to the external auditory canal, the passage that extends from the auricle to the tympanic membrane. In humans, it is a narrow tube, approximately 2.5 centimeters in length and 0.7 centimeters in diameter. The outer third of the canal is cartilaginous, while the inner two-thirds are bony. This bony portion is lined by skin that is a direct continuation of the periosteum.

The skin of the external auditory canal contains specialized glands. In the outer cartilaginous portion, these are ceruminous glands, which produce cerumen, commonly known as earwax, and sebaceous glands, which secrete sebum. These secretions combine to form earwax, which lubricates the canal, traps foreign particles, and possesses antibacterial properties, thus protecting the tympanic membrane. In the inner bony portion, the skin is thinner and lacks these glands.

The external auditory canal plays a crucial role in hearing by conducting sound waves from the environment to the tympanic membrane. The shape and length of the canal also help to amplify certain frequencies. Its slightly curved shape also contributes to protecting the eardrum from direct injury. Obstructions or inflammation of the Gehörgang can lead to hearing loss or discomfort.