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Essentials of Otolaryngology

External ear consists of the auricle and the external auditory canal
What is the auricle composed of except for the lobule, the auricle is composed of elastic cartliage and skin
How is the auricle attached to the head? by the external auditory canal and several small muscles innervated by the facial nerve
Innervated Supply (an organ or other body part) with nerves.
External Auditory Canal cartilaginous in the lateral third and bony in the inner two-thirds
Cartilaginous portion of the skin contains... hair follicles, sebaceous glands, and cerumen glands
What provides potential pathways for the spead of tumor and infection from the canal into the parotid gland? Small dehiscences in the anterior portion of the cartilaginous external auditory canal.
Dehiscences the release of materials by the splitting open of an organ or tissue.
What are the borders of the external ear canal? The temporal lobe superiorly, mastoid posteriorly, TMJ and parotid gland anteriorly, and the TM medially.
What recieves it's blood supply from the superficial temporal and posterior auricular branches of the external carotid artery? aurticle and external auditory canal
An air-containing space with bony walls except for the TM laterally. middle ear
In the middle ear, what leads downward and medially to the nasopharynx? eustacian tube
Created by: JTtdsClark