- Adrenal (suprarenal) gland: Overview (x55) and detail of the corticomedullary junction (x350). HE. Cat.
- Apical pole of epithelium: glycocalyx and tight junction. MET-Ruthenium red. x80,000. Pharyngeal epithelium of Rainbow trout O. mykiss.
- Axoneme: cross-sectional structure. TEM. x70,000. (Image provided by M. Paz Herráez, ULE)
- Ciliated lining epithelium. Rat tracheal epithelium (HE, x1,150) and mesothelium of Pleurodeles waltl (TEM, x6,300).
- Compound mixed exocrine gland, tubuloacinar. HE. x460. Submandibular salivary gland of rat.
- Desmosomes between keratinocytes by light microscopy (HPI, x1,150) and TEM (x33,000). LM: Epidermis of rat; TEM: Epidermis of frog, Pelophylax perezi.
- Endocrine follicles. HE. x450. Rat thyroid.
- Endothelium. Arteriole. TEM. x3,000. Golden hamster thymus (Mesocricetus auratus). Vein. HE. x1,150. Rainbow trout (O. mykiss).
- Enteroendocrine cells. Gastrin-secreting G cell. IP anti-G. x450. LG (secretin-secreting) cell. TEM. x5,400. IP: Human stomach, image by Afonso Barbosa, JA, 2017. Gastric Cancer. http://dx.doi.org/10.5772/intechopen.69722 (licensed under CC BY 3.0). TEM: Human duodenum, image by Pearse AGE et al., 1970. Gut 11: 649-658 (licensed by BMJ Publishing Group Ltd).
- Epithelial regeneration. Lieberkühn's crypts of cat (HE, x580), human hair bulb (HE, x390), and cat taste bud (HE, x370).
- Epithelium with basal striation. HE. x1,150. Interlobular striated excretory ducts of rat salivary gland.
- Expression of cytokeratins in epithelial cells. IP anti-pankeratin. x500. Epidermis of Rainbow trout O. mykiss.
- Glandular lobes and lobules. HE. x115. Salivary gland of rat.
- Hemidesmosomes in an epitelial cell. TEM. Mouse trachea (image modified from ©2006 Nguyen N.M. et al., https://doi.org/10.1186/1465-9921-7-28, licensed by BioMed Central Ltd under CC-BY-SA-2.0 license).
- Intercellular gap junction. TEM. x37,000. Mesothelium of the jugular body of Rana temporaria
- Interrenal endocrine tissue. CSF. Toluidine blue. x480. Inset: HPI. x120. Pronephros of Brown trout, Salmo trutta fario.
- Intracellular canaliculi of parietal (oxyntic) cells. TEM. x7,300 (left) and x5,800. Stomach of European beaver, Castor fiber (images by Ziółkowska, N., et al., 2014. PLoS ONE: e94590. doi:10.1371/journal.pone.0094590, licensed under Creative Commons Attribution 4.0).
- Intraepithelial macrophages. CSF. Az. toluidine. x1,150. Lieberkühn's crypts of rat.
- Langerhans islet. HE. x640. Cat pancreas. Inset: Detail of granules from an endocrine β-cell. TEM. x13,400. Pelophylax perezi pancreas (image provided by R.M. Pérez Gomariz, UCM).
- Langerhans-type interdigitating dendritic cell. TEM. x3,500. Inset: Birbeck granules. TEM. x35,000. Pharyngeal epithelium of Brown trout Salmo trutta fario (image by F. Álvarez, ULE).
- Lateral labyrinth of unicellular mucous glands. TEM. x20,000. Epidermis of Pelophylax perezi.
- Lobes, lobules and excretory ducts of a compound exocrine gland. HE. x70. Submandibular salivary gland of rat.
- Mesothelium. HE. x950. Porcine liver.
- Mioepithelial cells of mucous multicellular gland. TEM. 3,300x. Skin of Pelophylax perezi.
- Mucous acinar adenomeres. HE. x1,150. Rat submandibular salivary gland.
- Multicellular serous gland. HE. x325. Cat pancreas.
- Ordered microvilli (brush border). MET. x20,000. Intestinal epithelium of rat (image provided by J. Vaquera, ULE).
- Pseudostratified ciliated epithelium. HPI-Al. Blue. x1,150. Nasal epithelium of frog (P. perezi).
- Pseudostratified columnar ciliated epithelium. HE. x850. Cat trachea.
- Respiratory (simple squamous) epithelium with microvilli. CSF. Az. toluidine. 1,150x. Inset: Simple squamous branchial epithelium. MET. x1,600. Gill filaments of O. mykiss. Image of E. Flaño (ULE)
- Reticular stroma. Gomori staining. x460. Submandibular salivary gland of rat.
- Sebaceous gland. HE. x1,150. Human hairy skin.
- Sensory epithelial cells. Nasal epithelium (HPI, x1,000), Pelophylax perezi; Epidermal crest (HE, x780), human skin; Taste buds (HE, x650), cat taste papilla; Ampullary crest (HE, x680), semicircular canal of O. mykiss
- Serous and mucous adenomeres (mixed gland). TrG. x1,150. Developing submandibular salivary gland of rat.
- Serous and lipid secretion adenomeres. HE. x450Active human mammary gland (image from Michigan Histology and Virtual Microscopy website, licensed under Creative Commons license 4.0).
- Serous tubuloacinar adenomeres (HE, x550) and detail of a pancreatic acinar cell (TEM, x6,000). Exocrine pancreas of cat and of Pleurodeles waltl (image by R. M. Pérez Gomariz, Bioimágenes, Faculty of Biological Sciences, UCM).
- Simple ciliated secretory columnar lining epithelium. van Gieson. x1,150. Dorsal epithelium of the typhlosole of Lumbricus terrestris.
- Simple columnar epithelium. HE. x1,150. Distal convoluted tubule of Rainbow trout (O. mykiss).
- Simple columnar epithelium with closed mucosal pole. HE. x1,150. Superficial gastric mucosa of toad (Bufo bufo).
- Simple columnar epithelium with stereocilia. HE. x1,150. Wolffian duct of Rainbow trout (O. mykiss).
- Simple columnar epithelium with striated border and goblet cells. HPI-Al. Blue. x1,150. Cat duodenum.
- Simple columnar epithelium with striated border. HE. x1,260. Cat duodenum.
- Simple columnar epithelium with striated border. HE-PAS. x1,150.
- Simple columnar lining epithelium with striated border. HE-PAS. x1,150. Intestinal villi of rat.
- Simple cuboidal epithelium with microvilli (brush border). HE. x1,150. Proximal convoluted tubule. Mesonephros of Rainbow trout (O. mykiss).
- Simple cuboidal epithelium with mucous cuticle. HPI-Al. Blue. x460. Cephalic tegument of snail (Helix sp.)
- Simple epithelium with chitinous cuticle. van Gieson. x1,150. Insect tegument.
- Simple epithelium with non-chitinous fibrous cuticle. van Gieson. x1,150. Tegument of Lumbricus terrestris.
- Simple multicellular glands, alveolar serous and mucous. HPI-Al. Blue. x460. Parotid glands of Pelophylax perezi.
- Simple multicellular glands, mucous alveolar. HPI-Al. Blue. x460. Tegument of Pelophylax perezi.
- Simple tubular glands. HE. x200. Gastric mucosa of rat.
- Steroid-secreting endocrine cells. HPI (x1,150) and TEM (x15,000). HE: rat adrenal cortex. TEM: interrenal cell of Rainbow trout, O. mykiss (image by C. Fierro Castro and M.C. Santa-Cruz, UAB).
- Stratified cornified epithelium with horny scales. HPI. x450. Integument of Lacerta lepida.
- Stratified secretory lining epithelium. HE and HPI-Al. Blue. x230. Skin of Myxine glutinosa.
- Stratified squamous keratinized epithelium: keratinization. HE. x850. Human skin.
- Striated basal pole. TEM. Distal urinary tubule cell of rat kidney (image by Amano, O. et al., 2012: Acta Histochem Cytochem, 45: 241–250, https://doi.org/10.1267/ahc.12013, under licence Creative Commons Public Domain Mark 1.0.
- Terminal bar: junction complex (oblique section). TEM. x16,300. Bile canaliculus of Pleurodeles waltl
- Transitional epithelium. HE. x460. Cat urinary bladder.
- Tubular serous adenomeres. TrG. 1,150x. Rat salivary gland.
- Types of epithelial tissues: covering epithelia and glands. Intestine of tadpole (P. perezi). Van Gieson's stain. x460. Cat pancreas. HE. x460.
- Unicellular mucous glands. HE, x500(epidermis of Rainbow trout), HE-PAS, x750(epidermis of Salmo trutta fario) and MET, x8,000. (gill epithelium of Rutilus rutilus, image provided by A.G. Zapata, UCM).