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The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear.The adult human ear canal extends from the auricle to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.
This bony part is known as the auditory bulla and is formed by the tympanic part of the temporal bone. The ear canal ends at the external surface of the eardrum, while the surrounding skin contains ceruminous and sebaceous glands that produce protective earwax. [3] Earwax naturally migrates outward through ear canal, constituting a self ...
Cerumen keeps the eardrum pliable, lubricates and cleans the external auditory canal, waterproofs the canal, kills bacteria, and serves as a barrier to trap foreign particles (dust, fungal spores, etc.) by coating the guard hairs of the ear, making them sticky. [1] These glands are capable of developing both benign and malignant tumors.
The porion is the point on the human skull located at the upper margin of each ear canal (external auditory meatus, external acoustic meatus). It lies on the superior margin of the tragus . It is a cephalometric landmark with significance in biological anthropology and in clinical applications such as oral and maxillofacial surgery .
The auditory system is the sensory system for the sense of hearing. ... Anatomy of the human ear (The length of the auditory canal is exaggerated in this image ...
In anatomy, a meatus (/ m iː ˈ eɪ t ə s /, mee-AY-təs, [1] pl.: meatus or meatuses) [2] is a natural body opening or canal. Meatus may refer to: the external acoustic meatus, the opening of the ear canal; the internal auditory meatus, a canal in the temporal bone of the skull
The posterior root, a prolongation of the upper border, is strongly marked; it runs backward above the external auditory meatus. The anterior root, continuous with the lower border, is short but broad and strong; it is directed medialward and ends in a rounded eminence, the articular tubercle (eminentia articularis).
A meatus is a short canal that opens to another part of the body. [16] An example is the external auditory meatus. A fovea (Latin: pit) is a small pit, usually on the head of a bone. An example of a fovea is the fovea capitis of the head of the femur.