This cross section shows a human fetal testis. Numerous seminiferous tubules appear within a lobe of the testis. It has not been treated with an antibody but is autofluorescent and therefore appears b...

Histology sample illustrating the pseudostratified, ciliated columnar epithelium of the trachea. Note that the basement membrane underlying this particular epithelium is especially prominent. This im...

Gallbladder wall of a human patient with gallstones. The duct (clear zone at center) is lined by highly polarized epithelial cells with dark nuclei at the base. At the top of the picture, below the...

Gallbladder wall of a human patient with gallstones. The top layer is composed of highly polarized epithelial cells with microvilli partially visible at the apex and dark nuclei at the base. Below ...

Light micrograph showing a cross section through a hair follicle. The hair shaft is made up of hard dead protein called keratin, which is observed in the center. This is surrounded by skin cells that ...

Histology slide highlighting simple columnar epithelium, which line the luminal surfaces of the jejunum, the middle section of the small intestine. This image is slide 29 in the University of Michig...

Gallbladder wall of a human patient with gallstones. This low magnification view shows the wall of the diseased gallbladder to have a top layer of highly polarized epithelial cells over a large volu...

Photomicrograph of a semithin section of a termite's gut stained with haematoxylin and eosin. The gut appears to be packed with Trichonympha - a genus of protists found in the gut of many termite spec...

Shown is a hematoxylin and eosin stained section through a plasmablastic lymphoma of the oral cavity in an HIV-positive adult male. There is a diffuse proliferation of large neoplastic cells most of w...

This batik was produced from a hematoxylin and eosin stained section from a neonatal mouse ovary. The image shows various structures within the ovary, including five oocytes in developing follicles. B...