5 Questions
What are the three divisions of the ear?
The three divisions of the ear are the external, middle, and internal ear.
What separates the external ear from the middle ear?
The tympanic membrane separates the external ear from the middle ear.
What are the components of the middle ear?
The middle ear contains the auditory ossicles (malleus, incus, and stapes) and air.
What is the composition of the inner ear?
The inner ear is composed of the osseous labyrinth and the membranous labyrinth containing auditory and vestibular nerve receptors.
What is the structure of the auricle or pinna?
The auricle or pinna has a skeleton of resilient yellow elastic cartilage which is thrown into folds, giving it its characteristic shape.
Study Notes
The Divisions of the Ear
- The ear is divided into three main parts: the external ear, the middle ear, and the inner ear.
The External Ear
- The external ear, also known as the pinna or auricle, is the visible outer portion of the ear.
- The structure of the auricle is cartilaginous, with a thin layer of skin covering it.
Separation of the External and Middle Ear
- The external ear is separated from the middle ear by the eardrum, also known as the tympanic membrane.
The Middle Ear
- The middle ear is an air-filled cavity that contains three small bones: the malleus, incus, and stapes.
- These bones are responsible for transmitting sound vibrations from the eardrum to the inner ear.
The Inner Ear
- The inner ear is composed of the cochlea, vestibule, and semicircular canals.
- The cochlea is responsible for hearing and sound processing, while the vestibule and semicircular canals are responsible for balance and equilibrium.
Test your knowledge of the external and middle ear anatomy with this quiz. Explore the structure and functions of the auricle, external acoustic meatus, tympanic membrane, and the tympanic cavity.
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