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12 Cards in this Set

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Thyroid Gland
An endocrine gland w/right and left lobes on either side of trachea
Isthmus
mass of tissue connecting lobes of thyroid gland
Pyramid lobe
fingerlike projection of isthmus; in front of trachea
Thyroid follicle epithelium
microscopic sherical sacs make up most of the thyroid glands
Follicular cells
form walls of follicle (extend to lumen of follicle)
Thyroid hormones-
function regulate metabolism and activity of nervous system
Thyroxine
T4
Triiodothyronine
T3
Parafollicular cells (C cells)
can be embedded w/in follicle or between follicles
produces Calcitonin
Calcitonin
Lowers blood levels of calcium; increases calcium in bones (regulates calcium homeostasis)
Parathyroids
embedded in the posterior surfaces of lateral lobes of the thyroid gland
Parathyroid hormone
PTH- increases blood calcium and magnesium levels