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Nov 3, 2023 · The medial aspect of the ear lobe is attached to the skull and has no major practical significance. The lateral aspect is concave and presents numerous grooves and ridges. The outer rim of the auricle is called the helix, which then inferiorly ends as soft tissue known as the lobule of auricle (or ear lobe). The helix has three parts: crus ...
Mar 14, 2024 · The ear anatomy consists of three parts: the outer Ear, middle Ear, and inner Ear. The outer Ear is the part you can see, including the flap of skin called the pinna and the tube-like ear canal. The middle Ear is inside your head, and there is a space called the middle Ear.
- Tympanic Orifice
- Osseous Portion
- Cartilaginous Portion
- Pharyngeal Orifice
Thetympanic orificeof the Eustachian tube marks the opening of the tube into the middle ear. It is located just above themiddle ear floor. Anterolateral to this opening is Huguier’s canal – where the chorda tympani nerve leaves the middle ear. The internal carotid arteryis closely associated with the medial wall of the Eustachian tube at the tympan...
The osseous portionrefers to the third of the Eustachian tube nearest to the middle ear. It can be variably surrounded by peritubal air cells. Along the roof of the osseous part of the Eustachian tube is a canal containing the tensor tympani muscle. The distal end of the osseous portion is formed by the petrous part of the temporal bone. It has a s...
The cartilaginous portionrefers to the two-thirds of the Eustachian tube nearest to the nasopharynx. It lies in a groove between the petrous part of the temporal bone and the greater wing of the sphenoid bone (petrosphenoidal fissure). The cartilaginous part is incomplete along the lower and lateral margin of the tube, and is completed by fibrous t...
The pharyngeal orificemarks the opening of the Eustachian tube into the nasopharynx. It is located posteriorly to the inferior concha of the nasal cavity. The epithelial lining of the tube near the pharyngeal orifice is ciliated pseudostratifiedwith goblet cells.
Nov 15, 2021 · The ear can be divided into external, middle and inner parts. The external ear contains the auricle, external auditory meatus and tympanic membrane. These structures all work together to conduct and amplify sound waves into the middle ear. The middle ear contains the auditory ossicles, these transmit sound waves to the inner ear. The muscles ...
The vibrations move 3 tiny bones on the other side of the drum and make their way into a small spiral tube, where special hearing receptors turn them into signals. The signals get sent up through a...
Jan 22, 2018 · There are two main sections within the inner ear: the bony labyrinth and the membranous labyrinth. The cochlea, the hearing organ, is located inside the inner ear. The snail-like cochlea is made...
Aug 16, 2020 · Written by Oliver Jones. Last updated August 16, 2020 • 43 Revisions •. The ear can be divided into three parts; external, middle and inner. This article will focus on the anatomy of the external ear – its structure, neurovascular supply and clinical correlations.
