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The Endocrine System

The Endocrine System. The Pituitary. Low magnification – the entire Pituitary Gland. Pituitary Stalk. Pars Tuberalis. Posterior Pituitary Pars Intermedia Anterior Pituitary. High mag of the Anterior Pituitary – note eosinophilic and basophilic cells.

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The Endocrine System

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  1. The Endocrine System The Pituitary

  2. Low magnification – the entire Pituitary Gland Pituitary Stalk Pars Tuberalis Posterior Pituitary Pars Intermedia Anterior Pituitary

  3. High mag of the Anterior Pituitary – note eosinophilic and basophilic cells

  4. Immunohistochemictry of the Anterior Pituitary Growth Hormone ACTH

  5. TEM of the Anterior Pituitary – note different granule morphology C – corticotrophs (ACTH); G – gonadotrophs (FSH,LH) S – somatotrophs (growth hormone); T Thyrotrophs (TSH) ; F – fenestrated capillary

  6. High mag of the Posterior Pituitary – neurons, capillaries, and pituicytes

  7. High mag of the Posterior Pituitary – note Herring Bodies (arrow)

  8. TEM of the Posterior Pituitary UN -unmyelinated neuron; asterisks – Herring Body

  9. The Thyroid & Parathyroids

  10. High mag of thyroid follicles – note Parafollicular or C-Cells (arrows)

  11. Low Magnification of the Parathyroid Gland

  12. Parathyroid Gland – note small dark staining chief cells and larger, eosinophilic oxyphil cells

  13. The Adrenal Glands

  14. Low magnification of the Adrenal Gland Cortex Medulla Cortex

  15. Adrenal Cortex Zona Glomerulosa Zona Fasciculata Zona Reticularis

  16. Adrenal Cortex Zona Glomerulosa (clumps, cords, and follicle like structures Zona Fasciculata (cords of spongiocytes)

  17. Zona Fasciculata cords of spongiocytes Zona Reticularis darker staining cells Adrenal Gland

  18. Adrenal Medulla

  19. The Islets of Langerhan

  20. Low magnification of the Pancreas with Islets of Langerhans (arrows)

  21. High mag of an Islet – note Beta cells and more eosinophilic Alpha2 cells Acini Alpha Cells

  22. Immunohistochemistry of a pancrearic Islet of Langerhans Glucagon Insulin

  23. Pineal Body The Seat of the Soul The Third Eye

  24. Pineal Gland N – neuroglia P –pinealocytes S – Brain Sand

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