Membrana tympanica
It protects the body from harmful materials from passing through the nasal canal. It captures things like dust to help prevent possible problems. It is a form of body defense.
Outer ear
it protects the ear by trapping dust and other foreign substances
The ceruminous gland produces cerumen (earwax) that protects the skin in the ear from dust, bacteria, and very small insects.
Ear Wax, or cerumen, is secreted in the ear to keep out small foreign objects such as dust and dirt (not unlike the snot in your nose). Most professionals will tell you that it is passes on its own and Qtips actually impact, or force it back where it blocks your ear canal.
Dust can enter the outer ear, which can be washed just like any other body part. The eardrum prevents dust from entering the middle ear.
The length of ear canal protects the ear drum..rather the pinna also engage in this process...
Outer ear
Outer ear
Outer ear
It is produced by the wax glands, known as ceruminous glands, of the ear canal in many mammals including humans. These glands produce a watery substance that acts as a lubricating agent. It is also known to have antibacterial and antifungal properties. Its main function is to protect the inner parts of the ear from dust, dirt, insects and harmful microorganisms like bacteria and fungi. This sticky substance traps these particles and thereby prevents them from entering deeper into the ear canal and eardrum. As a lubricating agent, it protects the inner skin of the ear canal from infection and irritation.