Thyroid gland. Coloured scanning electron micrograph (SEM) of a fracture through the thyroid gland revealing several follicles. Between the follicles is connective tissue. A follicle consists of a layer of epithelial cells around a central storage chamber. The cells produce the thyroid hormones tri-iodothyronin (T3) and thyroxine (T4) and secrete them into the central chamber where they are stored as the glycoprotein thyroid colloid (purple). Thyroid hormones regulate the body's metabolism. Magnification: x80 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4572 px × 3854 px |
Model Release : | Non requis |
Restrictions : | - |