Time lapse movie of a developing sand dollar embryo expressing GFP-histone H2B. The movie shows several rounds of mitoses.

Sand dollar embryos expressing GFP-H2B going thru stages of mitosis. Video is animated with the cursor indicating the stages of mitosis and the morphological characteristics of the stage during the t...

Yolk syncytial layer nuclei undergo epiboly and converge dorsally during late gastrulation. Video made available by Mark Cooper through Zebrafish - The Living Laboratory.

Rolling of leukocytes on the walls of the caudal vein in a larval zebrafish; real time. As in adult mammals, such rolling occurs only in veins, not in arteries. Video made available by Mark Cooper th...

An anucleate cytoplast--a piece of lamellipodium detached from its parent cell--is able to migrate autonomously, without a nucleus, Golgi Apparatus, or microtubules. Image made available thru Mark Coo...

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...

Leishmania mexicana promastigote forms (WHO strain MNYC/BZ/62/M379). Cells were grown in M199 culture medium and fixed with glutaraldehyde, dehydrated in ethanol, critical-point dried and sputter coat...

Reproductive tissue of olive (Olea europaea) pistil during the progamic phase.

Scanning electron micrograph of passion flower pollen. A related image is CIL:39346.

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...