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24 Cards in this Set
- Front
- Back
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THYROID GLAND |
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What is the larges endocrine gland? |
Thyroid gland |
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The thyroid gland is what? |
The largest endocrine gland |
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where is the thyroid gland located? |
anterior and lateral regions of the neck inferior to the thyroid cartilage |
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does the thyroid gland have ducts or are they ductless? |
Ductless |
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The thyroid gland consist of what? |
2 lateral lobes connected anteriorly by an isthmus |
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In a healthy person what should the thyroid gland be like? |
not visible can be palpated mobile (moving superior when a person swallows) |
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PARATHYROID GLAND |
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the parathyroid gland usually consist of what? |
4 to 8 small endrocrine glands |
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Where are the parathyroid glands located? |
two on each side, usually close to the thyroid gland or inside it on the posterior surface |
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The parathyroid should do what? |
are not visible cannot be palpable
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True or False
The parathyroid glands may alter the thyroid gland because of their involvement in a disease process |
TRUE |
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HISTOLOGY OF THYROID GLAND |
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What is the thyroid gland covered by? |
a connective tissue capsule which extends into the gland by way of septa |
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The Septa divides the gland into what? |
larger lobes smaller lobules |
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What are each lobule composed of? |
Follicles |
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Follicles are filled with what? |
colloid, a stiff material/ Future production of thyroxine |
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The thyroid secretes what? |
Thyroxine (hormone that stimulates the metabolic rate) |
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DEVELOPMENT OF THYROID GLAND |
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What is the first endocrine gland to appear? |
Thyroid gland |
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What does the thyroid gland develop from? |
endoderm invaded by mesenchyme |
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When does the thyroid gland develop? |
24th day |
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What does the thyroid gland form from? |
a median downgrowth at the base of the tongue Connected by thyroglossal duct |
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Where is the opening of the thryoglossal duct? |
Foramen Cecem located where the sulcus terminalis points backwards towards the oropharynx |
