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What is Which of the following is the derivative of ultimobranchial body? and explain in detail?
Ans. B Parafollicular 'C' cellsRef: Gray's Anatomy E-book. P 61ENDODERMAL POUCHES* 1st pouch: Dorsal part forms tub tympanic recess which forms the middle ear cavity and eustachian tube.* 2nd pouch: Joins with ventral part of 1st pouch to form palatine tonsil. Also forms parts of middle ear.* 3rd pouch: Dorsal part forms the inferior parathyroid gland and ventral forms thymus.* 4th pouch: Dorsal part forms the superior parathyroid gland.# Ventral part forms the ultimobranchial body which forms the parafollicular C-cells of thyroid.