Kuulmekanalit

Kuulmekanalit, also known as the ear canal or external auditory canal, is the tube that connects the outer ear to the eardrum. In humans, it is a narrow, slightly curved passage approximately 2.5 centimeters long and 0.7 centimeters in diameter. The outer third of the canal is cartilaginous, while the inner two-thirds are bony.

The skin lining the kuulmekanalit contains specialized glands called ceruminous glands and sebaceous glands. Ceruminous glands produce cerumen, commonly known as earwax, which is a waxy, sticky substance that helps to protect the ear canal. Earwax traps dust, dirt, and other foreign particles, preventing them from reaching the eardrum. It also has antibacterial and antifungal properties, further safeguarding the ear. Sebaceous glands produce sebum, an oily substance that lubricates the ear canal.

The primary function of the kuulmekanalit is to conduct sound waves from the outside environment to the eardrum. The shape and length of the canal amplify certain frequencies, contributing to our ability to hear. It also plays a role in protecting the delicate structures of the middle and inner ear from injury and infection. The slight curve of the canal helps to direct debris outwards, aiding in self-cleaning.