- Functional unit of the thyroid is the follicle:
- Outer sphere of cuboidal epithelial cells (thyrocytes) and thin basement membrane:
- Site of thyroglobulin production
- Filled with a protein rich core called colloid:
- Made up of thyroglobulin a large glycoprotein
- Serves as the main storage of thyroid hormones
- Outer sphere of cuboidal epithelial cells (thyrocytes) and thin basement membrane:
- C-cells are dispersed between follicles to produce calcitonin
