Scanning electron micrograph of collagen fibrils, showing their characteristic 'D banding' morphology. These collagen fibrils are present in the joint capsule tissue that surrounds the knee.

Light micrograph of a human embryo at the blastocyst stage, about six days after fertilization. The embryo is in the process of "hatching" out of the zona pellucida - the tough outer membrane - just b...

A confocal micrograph of a human embryo, with some remaining sperm cells, about five days after fertilization. The nuclei of both the sperm and cells of the embryo are stained purple, the tails of the...

A human sixteen-cell embryo, also called a morula (latin for mulberry). The embryo has gone through four cycles of cell division to get to this stage and the cells have undergone compaction whereby th...

Fluorescent micrograph of epithelial cells from the bladder wall. The cells were isolated immediately after collection of a urine specimen and are not fixed. The image was taken using a standard epi...

Colorized scanning electron micrograph of collagen/connective tissue removed from a human knee during arthroscopic surgery. The horizontal field width of the image is 16 microns. Wellcome Image Awar...

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 ...

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...

Colorized scanning electron micrograph showing psoriasis (an inflammatory skin disorder) of the tongue. This condition on the tongue causes rough, scaley and bumping texture to the surface.

Human sperm diluted in buffer imaged at room temperature within two hours of ejaculation. Cell at center swims at constant speed.