Flashcards in Development Deck (19)
Pituitary gland is primarily from what precursor?
Thyroid gland is primarily from what precursor?
Endoderm - some neural crest
Parathyroid gland is primarily from what precursor?
Adrenal gland is primarily from what precursor?
Endocrine glands begin as an ____________.
True or False: Endocrine gland cord dissociates from the epithelium.
Rathke's pouch/Hypophyseal diverticulum becomes what?
Anterior wall - distal lobe
Superior extension - tuberal lobe
Posterior wall - intermediate lobe
The neurohypophyseal diverticulum/neurohypophysis/infundibulum becomes what?
Posterior pituitary - from floor of diencephalon
What does the infundibulum become?
Posterior Pituitary: Median eminence + Pituitary stalk + Neural lobe
How does the thyroid gland begin?
Midline diverticulum in the floor of the pharynx (thickening between 1st and 2nd pharyngeal arches)
What do pharyngeal pouches 3 and 4 form?
What is the origin of thyroid follicular cells?
Thyroid diverticulum (endoderm)
What is the origin of the parafollicular cells?
Neural crest cells from ultimopharyngeal body
What is the origin of the parathyroid gland principal cells?
Dorsal wing of pharyngeal pouch 3 and 4 (endoderm)
What happens if you have remnants and cystic formation along the pathway of the thyroglossal duct?
Thyroglossal duct cyst
What are the chromaffin cells (adrenal medulla) formed from?
What structure forms the adrenal gland?
Urogenital ridge (mesoderm) - 2 waves of cells
1. Fetal adrenal cortex
2. Definitive adrenal cortex
Where do the waves of cells originate from to form the adrenal cortex?