Endocrine System Embryology 1 Flashcards

1
Q

From what tissue does the hypothalamus develop?

A

Ectodermal tissues (on day 32 the hypothalamic sulcus develops from the diencephalon)

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2
Q

What tissue invaginates to form the anterior lobe of the pituitary gland?

A

Ectodermal tissue of the oropharynx

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3
Q

This invagination is known as what?

A

The Rathke’s pouch, which eventually extends downward to the hypothalamus and becomes the pituitary stalk

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4
Q

From what does the posterior lobe of the pituitary gland arise?

A

The neural crest

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5
Q

What does the pancreas form from?

A

From two diverticular buds of the foregut

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6
Q

By what week have the first islets of the pancreas appeared?

A

Around week 10, they first appear in the tail of the pancreas.

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7
Q

From what tissue does the thyroid develop?

A

It starts developing in the primitive alimentary tract and consists of endodermal cells

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8
Q

Where does the thyroid first develop?

A

In the buccal cavity

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9
Q

What structure does the thyroid gland help to develop as it matures?

A

The tongue

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10
Q

What is embryonic connection do the tongue and thyroid share?

A

The thyroglossal duct

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11
Q

Where on the tongue does the thyroglossal duct open?

A

The foramen cecum

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12
Q

From which pouches do the parathyroid glands develop?

A

The superior gland descends from the fourth pharyngeal pouch and the inferior glands from the third pharyngeal pouch

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13
Q

True or false: The adrenal cortex and medulla develop from the same embryonic line

A

False, the cortex develops from coelomic mesodermal tissue and the medulla arises from ectodermal tissue of the neural crest

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14
Q

Between the adrenal cortex and the medulla, which develops parallel with the sympathetic nervous system?

A

The adrenal medulla (which secretes epinephrine, norepinephrine, and dopamine).

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