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Flashcards in Development Deck (19)
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1

Pituitary gland is primarily from what precursor?

Ectoderm

2

Thyroid gland is primarily from what precursor?

Endoderm - some neural crest

3

Parathyroid gland is primarily from what precursor?

Endoderm

4

Adrenal gland is primarily from what precursor?

Mesoderm

5

Endocrine glands begin as an ____________.

Epithelium bud

6

True or False: Endocrine gland cord dissociates from the epithelium.

True

7

Rathke's pouch/Hypophyseal diverticulum becomes what?

Anterior pituitary
Anterior wall - distal lobe
Superior extension - tuberal lobe
Posterior wall - intermediate lobe

8

The neurohypophyseal diverticulum/neurohypophysis/infundibulum becomes what?

Posterior pituitary - from floor of diencephalon

9

What does the infundibulum become?

Posterior Pituitary: Median eminence + Pituitary stalk + Neural lobe

10

How does the thyroid gland begin?

Midline diverticulum in the floor of the pharynx (thickening between 1st and 2nd pharyngeal arches)

11

What do pharyngeal pouches 3 and 4 form?

Parathyroid

12

What is the origin of thyroid follicular cells?

Thyroid diverticulum (endoderm)

13

What is the origin of the parafollicular cells?

Neural crest cells from ultimopharyngeal body

14

What is the origin of the parathyroid gland principal cells?

Dorsal wing of pharyngeal pouch 3 and 4 (endoderm)

15

What happens if you have remnants and cystic formation along the pathway of the thyroglossal duct?

Thyroglossal duct cyst

16

What are the chromaffin cells (adrenal medulla) formed from?

Neural Crest

17

What structure forms the adrenal gland?

Urogenital ridge (mesoderm) - 2 waves of cells
1. Fetal adrenal cortex
2. Definitive adrenal cortex

18

Where do the waves of cells originate from to form the adrenal cortex?

Coelomic epithelium

19

How does the pineal gland develop?

Associated w/ diencephalon (roof)