Histology of Thyroid

Thyroid gland consists of colloid follicles which are lined by cuboid epithelial cells secreting the thyroid hormones, triiodothyronine (T3) and thyroxine (T4). Between the follicles is the interstitial space, containing the blood vessels and the parafolliclar (C) cells responsible for the secretion  of calcitonin.

Hematoxylin and Eosin stain

HE stain is a popular staining method in histology. Its a combination of two dyes the basic dye (hematoxylin) and the alcohol-based dye (eosin). In an HE stain you will usually see both eosinophilia and basophilia the nuclei of cells basophilic (blue), while eosinophilia is typical of cytoplasmic constituents (pink). Xylene, alcohols, distilled water are also required.

Layers of the epidermis

Lecture showing the 5 layers of the epidermis: basale, spinosum, granulosum, lucidum, corneum. The layers are showed on diagrams and in pictures taken by the use of light microscopy. The cells of the epidermis are also showed: Keratinocytes, Melanocytes, Merkell cells, Langherhans cells. Presents the difference between thick skin and thin skin.