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Questions and Answers
Which of the following is a purpose of ear wax?
Which of the following is a purpose of ear wax?
- Serve as a lubricant for ear movements
- Attract insects for ear protection
- Repel water (correct)
- Provide nutrients to the ear canal
Where does the external auditory canal relate to the temporomandibular joint?
Where does the external auditory canal relate to the temporomandibular joint?
- Behind
- Above
- Inside the joint
- In front (correct)
What is the origin of the auricle according to the text?
What is the origin of the auricle according to the text?
- 6 mesenchymal tubercles from the 1st&2nd branchial clefts (correct)
- Formed from ossicles in the middle ear
- Developed from the ectoderm of the 3rd branchial cleft
- Derived from the parotid gland during embryonic development
What is the term for a shallow pin point depression in the skin just in the root of the helix?
What is the term for a shallow pin point depression in the skin just in the root of the helix?
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What is the purpose of pinna plasty mentioned in the text?
What is the purpose of pinna plasty mentioned in the text?
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Study Notes
Functions of Ear Wax
- Ear wax protects the ear canal by trapping dust, dirt, and other small particles that could potentially damage the eardrum
- Ear wax also has antibacterial properties, which helps to prevent infections in the ear canal
Anatomy of the Ear
- The external auditory canal is separated from the temporomandibular joint (TMJ) by the mastoid process
- The temporomandibular joint is located just in front of the ear canal
Development of the Auricle
- The auricle (pinna) develops from the first and second pharyngeal arches during embryogenesis
Features of the Auricle
- A small depression in the skin, just in the root of the helix, is called a "pre-auricular pit" or "pre-auricular sinus"
- Pinna plasty is the surgical reconstruction of the auricle (pinna)
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Description
Test your knowledge on the composition and functions of ear wax, including its significance in the tympanic sulcus and tympanic annulus. Explore the purpose of ear wax, from repelling water to its antibacterial properties.
