1. Endocrine System Thyroid gland (No.35) Adrenal gland (No.36)
Hypophysis (No.37)
Next Lab: Quiz3 (Dig.Res.Uri.Endo. System)
Jun Zhou
School of Medicine, Zhejiang University

2. Thyroid gland Overview Capsule Parenchyma follicles with pink colloid
isthmus
lobe
Overview
Capsule
Parenchyma
follicles with pink colloid
interfollicle stroma

3. Follicle Interfollicle stroma 1)Follicular cells Simble cuboidal epi
Columnar (stimulated)
Squamous (inactive)
2)Parafollicular cells
3)Colloid
Interfollicle stroma

4. colloid
Follicular cell: Simple cuboidal epithelium

5. P
Parafollicular cells

6. Parafollicular cells, silver-stained

7. Adrenal gland
Capsule
Cortex
Medulla

8. Cortex
zona glomerulosa
zona fasiculata
zona reticularis

9. capsule
Zona glomerulosa
Zona fasiculata
Zona reticularis

10. Zona glomerulosa
Small cells in clusters
A few lipid droplets

11. Zona fasciculata Occupies large portion of the cortex
Arranged in cords
A lot of lipid droplets

12. Zona reticularis
Smaller,deep red-stained cytoplasm
Forming anatomizing network

13. Medulla Chromaffin cells:polyhedral, with chromaffin granules
Medullary vein

14. Chromaffin cells

15. Medulla: Sympathetic ganglionic cells
neuron

16. Hypophysis (Pituitary gland)
adenohypophysis
Pars distalis
Pars intermedia
Pars tuberalis
neurohypophysis
Pars nervosa
stalk

17. Hypophysis Infundibular stalk Pars distalis Pars nervosa
Pars intermedia
Hypophysis

19. Pars distalis
Pars nervosa

20. Pars distalis
Acidophilic cells
Basophilic cells:peripherally located
Chromophobe cells:most numerous

21. Acidophil
Basophil
Chromophobes
Pars Distalis

22. Pars distalis

23. Pars intermedia
Follicles
Basophilic cells

24. Pars nervosa: unmyelinated nerve fiber
Herring body

25. Pars distalis
Pars intermedia
Pars nervosa

26. lipofuscin

27. The end!