Cat thyroid, light micrograph. In this species the follicles have a small average size, so much so that, at times, they do not seem to exist. This characteristic is even more pronounced in this sample, of a postnatal maturing thyroid. The presence of mitosis (at centre) proves the immature nature of the gland. The visible colloid in the follicles shows a slight retraction, being separated from the epithelium. Reabsorption vacuoles (clear rounded 'punched out' areas generally located at the edge of the colloid) stand out, formerly interpreted as evidence of colloid reabsorption by thyrocytes, they are in fact artifacts. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / JOSE CALVO |
Bildgröße: | 3840 px × 2596 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |