histo 3.03.00 endocrine system
DESCRIPTION
dasTRANSCRIPT
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ENDOCRINE
DD. DL.DSI.DSR.F
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ADRENAL GLANDS
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1 - capsule 2 - cortex 3 - medulla
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1 – Capsule 2 - zona glomerulosa 3 - zona fasciculata 4 - zona reticularis 5 - Medulla
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Close-up of the medulla which produces epinephrine (adrenalin) and norepinephrine.
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Cortex
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Makes MINERALCORTICOIDS, superficial ovoid groups
Makes GLUCOCORTICOIDS, Columns of cells
Makes ANDROGENS, Deep anastomosing cords of darker cells
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Medulla
Capsule
Cortex
z. Fasciculata
z. Reticularis
z. glomerulosa
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Capsule
Zona Glomerulosa Zona Fasciculata
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THYROID GLAND
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1 – follicle 2 - follicular cells 3 - colloid
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The thyroid has follicles.
The parathyroid is made of
denser tissue.
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Colloid contains thyroglobulin follicular cells secrete thyroid hormones
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Follicle with colloid
Follicular cell
Parafollicular cell
Follicular cells– Simple Cuboidal epithelium , LINE the follicles Parafollicular cells – single or clumps, PERIPHERY (outside) the follicles
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PARATHYROID GLAND
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1 - chief cells 2 - oxyphil cells : Oxyphil cells produce PTH
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• Chief cells – darker stain
• Oxyphil cells – lighter stain
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PITUITARY GLAND
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1 - posterior pituitary gland 2 - anterior pituitary gland
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The anterior pituitary
(adenohypophysis) is also know as the
Pars distalis
The posterior pituitary
(neurohypophysis) is also known as the
Pars Nervosa
Pars Intermedia – remnant, Rathke’s
pouch
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Anterior Pituitary
Adenohypophysis
The secretory cell of the adenohypophysis are the acidophils and basophils.
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PARS DISTALIS contains:
Chromophobes
& Chromophils
(acidophils and basophils)
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Posterior Pituitary
Neurohypophysis
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PANCREAS
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Pancreatic ducts stain lighter and are sometimes confused with isles of Langerhans
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?
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1 – acini
2 - islet of langerhans
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Pacinian corpuscle in
pancreas
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