THYROID GLAND
Has distinctive “pools” of colloid surrounded by follicle cells.
Be able to identify under the ‘scope:
     Gland
     Follicle
     Colloid
Hormones:
     Calcitonin
     Thyroid Hormones (T4 & T3)

Photo taken by Theresa Carrera (100x)                                                         Photo taken by Dr. W. Coons (100x)

I think this gland looks like “swimming pools” of colloid surrounded by follicle cells.  Some of my students tell me that the follicles look like the fasicles in a steak.  Other students tell me the thyroid looks like a cobblestone street.

Photo taken by Theresa Carrera (400x)

The black circle indicates a follicle: a a small secretory sac or cavity.  The follicle cells make up the secretory sac containing the colloid.  Between the follicles are the parafollicular cells.

THYROID GLAND
PARATHYROID GLAND
PANCREAS
ADRENAL  GLAND (SUPRARENAL)
TESTIS
OVARY
PITUITARY GLAND (HYPOPHYSIS)

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