Lily mitosis. A light microscope image of a cell from the endosperm of an African globe lily Haemanthus (Scadoxus) katherinae. This is one frame of a sequence that shows all phases of mitosis. The lil...

Lily mitosis. A light microscope image of a cell from the endosperm of an African globe lily Haemanthus (Scadoxus) katherinae. This is one frame of a sequence that shows all phases of mitosis. The lil...

Lily mitosis. A light microscope image of a cell from the endosperm of an African globe lily Haemanthus (Scadoxus) katherinae. This is one frame of a sequence that shows all phases of mitosis. The lil...

Lily mitosis. A light microscope image of a cell from the endosperm of an African globe lily Haemanthus (Scadoxus) katherinae. This is one frame of a sequence that shows all phases of mitosis. The lil...

Lily mitosis. A light microscope image of a cell from the endosperm of an African globe lily Haemanthus (Scadoxus) katherinae. This is one frame of a sequence that shows all phases of mitosis. The lil...

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...

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...

An oocyte in a mature follicle. During the menstral cycle in females the ovary produces oocytes, which develop in follicles. As the follicle matures it increases in size, different cell types are recr...

Primordium (bud) of the weedy flower Tribulus sp. at its final stages of development. More than 100 z-stacks were combined to produce the final image, which was captured using epiillumination. Fifth ...

Tentacle of Portuguese Man o' War, Physalia physalis imaged with a stereomicroscope at 30x. Notorious for its painful, powerful sting, the Portuguese Man o' War has a gas filled floating chamber that ...