18 Questions
What is the total number of pharyngeal arches that develop by the end of the 4th week?
6
Which pharyngeal arch develops into the maxilla and mandible?
1st pharyngeal arch
What is the nerve associated with the 1st pharyngeal arch?
Trigeminal nerve
Which pharyngeal arch develops into the stapes and styloid process?
2nd pharyngeal arch
What is the derivative of the 3rd pharyngeal arch?
Greater horn of the hyoid bone
What is the nerve associated with the 4th pharyngeal arch?
Superior laryngeal nerve
What is the fate of the 4th pharyngeal arch?
Forms the subclavian artery and pulmonary artery
What develops from the 2nd pharyngeal pouch?
Palatine tonsils, pharyngeal tonsils, and lingual tonsils
What are the three components of the pharyngeal apparatus?
Pharyngeal grooves, pharyngeal arches, and pharyngeal pouches
What is the function of the pharyngeal clefts?
Form the external auditory meatus
Which pharyngeal pouch gives rise to the superior parathyroid gland?
4th pharyngeal pouch
During what week of embryonic development do the pharyngeal arches begin to develop?
4th week
What is the origin of each pharyngeal arch?
Ectoderm, endoderm, and mesoderm
What is the result of defects in the development of pharyngeal cleft 1?
Preauricular cysts and/or fistulas
What is the fate of the pharyngeal arches?
They contribute exclusively to the formation of the face, nasal cavities, mouth, larynx, pharynx, and neck
What happens to the pharyngeal arches as they grow?
They project forward from the back towards the front of the face and neck
What is the function of each pharyngeal arch?
To control a distinct muscle group and develop skeletal tissue
By the end of which month are the major features of the external body form recognizable?
2nd month
Learn about the development of pharyngeal arches, their components and the formation of various body parts. Understand the role of pharyngeal clefts, pouches and arches in the development of the head and neck. Test your knowledge of embryology and anatomy.
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