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External Ear Anatomy Quiz

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Questions and Answers

What is the function of the wax in the ear canal?

Prevent foreign objects from entering the ear canal, absorb excess moisture, and prevent bacterial growth

Provide nutrients to the ear canal, repel insects, and discourage fungal growth

Act as a cushion for the eardrum, regulate air pressure, and protect the ear canal from temperature changes

Repel water, trap dust and micro-organisms, moisturize epithelium, and possess antibacterial properties (correct)

Which structure is located in front and below the external auditory canal?

Temporomandibular joint

Mastoid air cells

Parotid gland (correct)

Middle cranial fossa

From where does the auricle develop?

6 mesenchymal tubercles from the 1st&2nd branchial clefts (correct)

Endoderm of the 2nd branchial cleft

Mesoderm of the 3rd branchial cleft

Ectoderm of the 1st branchial cleft

What is the significance of the tympanic sulcus and tympanic annulus?

<p>Constriction points in the external ear canal</p> Signup and view all the answers

What is the composition of ear wax?

<p>Amino acids, fatty acids, lysozymes, and immunoglobulins</p> Signup and view all the answers

Study Notes

What is the function of the wax in the ear canal? Which structure is located in front and below the external auditory canal? From where does the auricle develop? What is the significance of the tympanic sulcus and tympanic annulus? What is the composition of ear wax?

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Description

Test your knowledge of the external ear anatomy with this quiz by Prof. Khalaf Hamead. Explore the functions of the auricle and its significance in ear, nose, and throat constrictions. Delve into the details of the bony cartilaginous junction and the localization and protection functions of the external ear.