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Questions and Answers
What is the first pharyngeal arch known as?
What is the first pharyngeal arch known as?
Which pharyngeal arch is transitory and finally disappears?
Which pharyngeal arch is transitory and finally disappears?
What separates the pharyngeal arches from outside and inside?
What separates the pharyngeal arches from outside and inside?
How are the 4th and 6th pharyngeal arches related?
How are the 4th and 6th pharyngeal arches related?
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What is the inner lining of each pharyngeal arch composed of?
What is the inner lining of each pharyngeal arch composed of?
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Study Notes
Pharyngeal Arches
- The first pharyngeal arch is known as the mandibular arch.
- The first pharyngeal arch develops into the mandible, muscles of mastication, and part of the tongue.
- The second pharyngeal arch is known as the hyoid arch.
- The second pharyngeal arch develops into the stapes, styloid process, stylohyoid ligament, and part of the hyoid bone.
- The third pharyngeal arch develops into the greater horn and inferior part of the body of the hyoid bone.
- The fourth pharyngeal arch develops into cartilages of the larynx.
- The fifth pharyngeal arch is transitory and disappears.
- The sixth pharyngeal arch develops into cartilages of the larynx.
- The fourth and sixth pharyngeal arches are related because they contribute to the formation of the larynx.
- Each pharyngeal arch is separated from the outside by the pharyngeal clefts and from the inside by the pharyngeal pouches.
- The inner lining of each pharyngeal arch is composed of endoderm.
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Description
Learn about the development of the head and neck during embryonic stages, starting at the 4th and 5th week as a small area between the brain and the pericardial bulges, leading to the appearance of the cylindrical bars called pharyngeal arches.
