Follicles of a human thyroid gland. The follicles visible in this light micrograph show a large size and a flattened epithelium, indicating that they

---

Follicles of a human thyroid gland. The follicles visible in this light micrograph show a large size and a flattened epithelium, indicating that they are inactive or resting follicles. In this sample, the colloid is very well preserved, with a homogenous appearance and is filling the entire follicular cavity with little retraction. Magnification: x180 when printed at 10 centimetres across.

---

Size: 5760px × 4608px
Photo credit: © JOSE CALVO/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anatomical, anatomy, biological, biology, body, cell, cells, colloid, cuboidal, endocrine, endocrinology, epithelial, follicle, follicles, gland, histological, histology, hormonal, hormone, hormones, human, light, lm, medical, medicine, micrograph, microscope, secretion, section, system, t3, t4, thyroglobulin, thyroid, thyroxin