Histology of endocrine gland

 Thyroid gland

1.      Thyroid follicle is lined by simple cuboidal epithelium

2.    Thyroid follicles are filled with colloid.

3.    Thyroid follicle is formed by  Follicular cells and parafollicular cells

Adrenal gland

1. Outer cortex has three zones. zona glomerularis, zona fasciculata & zona reticularis.

2. The thichest zone is zona fasciculata contain long, parallal cords

3. Inner medulla contain several large vein (& large chromaffin

cells)

Pancreas

1. Pancreas is a mixed gland
2. Pancreatic acinus and ducts are the Exocrine components of this gland .
3. Islcts of langerhans (a tuff of cells.) are the Endocrine portion of this gland
4. Centro acinus cells are  present within lumen of the Pancreatic acinus