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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 ...
Ceruminous glands are specialized sweat glands located subcutaneously in the external auditory canal, in the outer third. Ceruminous glands are simple, coiled, tubular glands made up of an inner secretory layer of cells and an outer myoepithelial layer of cells. [1] They are classed as apocrine glands.
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 ...
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 .
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.
External auditory meatus is the ear canal; Fossa triangularis is the depression in the fork of the antihelix; Helix is the folded over outside edge of the ear; Incisura anterior auris, or intertragic incisure, or intertragal notch, is the space between the tragus and antitragus; Lobe (lobule) Scapha, the depression or groove between the helix ...
Malformation that may lead to functional impairment, such as atresia of the external auditory meatus [11] or aplasia of the pinna, [12] Genetic syndromes, which include: Konigsmark syndrome, characterised by small ears and atresia of the external auditory canal, causing conductive hearing loss and inherited in an autosomal recessive manner. [13]