What exactly is an erythrocyte sedimentation rate (ESR)? Find out in this lesson as we discuss the definition and normal range of an erythrocyte sedimentation rate as well as how it is done. Joint Pain
Ear wax performs the function of providing some protection against water. It also carries bacteria with it out of the ear canal. So by protecting the skin in the canal from water and by carrying away bacteria, ear wax can help prevent infections of the ear canal. Ear wax performs the function of providing some protection against water. It also carries bacteria with it out of the ear canal.
The Outer Ear. The outer ear consists of an earflap and an approximately 2-cm long ear canal. The earflap provides protection for the middle ear in order to prevent damage to the eardrum. The outer ear also channels sound waves that reach the ear through the ear canal to the eardrum of the middle ear.