Findings

Simple cuboidal epithelium of the follicle surrounds colloid containing thyroid hormones bound to the thyroglobulin.

Comment

The height of the follicle epithelium varies from low cuboidal to almost columnar depending on whether the thryoid gland is inactive, or actively synthesizing or secreting hormones, respectively.

Preparation

Paraffin section, hematoxylin and eosin

View

Medium-power light microscopy

Specimen

Thyroid follicle

Image Credit

V. Eroschenko, Ph.D.
Department of Biological Sciences
WAMI Medical Program
University of Idaho