Transverse section through the neural tube of an early stage chick embryo. The brown stain shows the neurofilament in the axons of the commisural neurons...

Light micrograph of human ovum (egg) and sperm. The ovum is much larger than the sperm and is surrounded by protective cumulus cells around the outside...

Light micrograph of a longitudinal section of the epididymis. The lining of the duct consists of pseudostratified epithelial cells, which have prominent...

This is a region of a (semithin) longitudinal section of onion root taken from the meristematic zone; this is the undifferentiated region of plant tissue...

A photomicrograph of a stained semi-thin section of mouse ovary, showing a maturing Graafian follicle. The ovary contains many follicles that contain...

This batik was produced from a hematoxylin and eosin stained section from a neonatal mouse ovary. The image shows various structures within the ovary...

This light micrograph shows the outside edge of two seminiferous tubules of a mouse testis. This section is a 1um thick transverse section, stained...

Brightfield image of Quercus (oak) leaf with tufted trichomes (fine outgrowths or appendages on plants and certain protists). Honorable Mention, 2009...

This light micrograph shows a transverse section of a region of mouse kidney cortex stained with toluidine blue. The kidney is made up of two distinct...

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...