QuestionSBA
QuestionChoice
This is not the correct answer. In human embryos, there are five pairs of pharyngeal pouches, but only four give rise to the head and neck structures. As such, there is no fifth pharyngeal pouch involved in the formation of structures in the head and neck such as the superior parathyroid glands.
10027355
e
Fifth pharyngeal pouch
QuestionChoice
This is the correct answer. In the fourth and fifth weeks of development, mesenchymal (connective) tissue growth in the cranial region results in the formation of the pharyngeal arches. Simultaneously, outpocketings form on the lateral aspect of the pharynx known as pharyngeal pouches. The pharyngeal arches are separated by pharyngeal clefts on the endodermal surface, and by pharyngeal pouches on the ectodermal surface. In human embryos, there are five pairs of pharyngeal pouches, but only four give rise to the head and neck structures. The fourth pharyngeal pouch gives rise to the superior parathyroid glands.
10027351
a
Fourth pharyngeal arch
QuestionChoice
This is not the correct answer. The third pharyngeal pouch gives rise to the inferior parathyroid glands and the thymus.
10027354
d
Third pharyngeal pouch
QuestionChoice
This is not the correct answer. The first pharyngeal pouch gives rise to the Eustachian tube and middle ear cavity
10027352
b
First pharyngeal pouch
QuestionChoice
This is not the correct answer. The second pharyngeal pouch gives rise to the lining of the palatine tonsils.
10027353
c
Second pharyngeal pouch
Concept
Chapter
2693
5974
Development of pharyngeal arches
Topic
171
Embryology
17868
Which pharyngeal pouch do the superior parathyroid glands originate from?
a