Transmission electron micrograph of rat kidney filtration barrier. Micrograph illustrates the basement membrane between fenestrated capillary endothelium and podocyte foot processes at intermediate m...

Figures 234 and 235 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. During spermiogenesis in insects, mitochondria fuse into a large spherical mass called the nebenkern. ...

Figure 236 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Fusion of mitochondria during insect spermiogenesis results in the formation of a structure called the nebenkern...

Figure 422 from Chapter 16 (Cytoplasmic matrix and cytoskeleton) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Transverse section through the caudal cytoplasm of a Chinese hamster spermatid shows mic...

Transmission electron micrograph of surface of nuclear envelope of guinea pig spermatocyte prepared by the Freeze-fracture technique shows the unusual clustering of nuclear pores in these cells. From...

Figure 275 from Chapter 8 (Lysosomes) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Lysosomes of cells engaged in heterophagy, like the Sertoli cells from the testis of the chinchilla shown here, are...

A lattice arrangement of mitochondria is rare in vertebrate cells, but can be observed here in mature Sertoli cells of the Xenopus testes. Multiple parallel fenestrated layers of cristae are interconn...

The image shows a mouse spermatocyte in meiosis immuno-labeled for two components, SYCP3 (red) and SYCP1 green) of the synaptonemal complex. The red and green signals have been offset to facilitate vi...

Time lapse movie of meiosis II in spermatocytes of the Locust Psophus stridulus showing two sequences that include metaphase and anaphase. This is a historic movie made in the early 40s by Kurt Mich...

Transmission electron micrograph of continuous endothelium from the capillary of a rat tongue. Image made available by James D. Jamieson and the Department of Cell Biology, Yale University School of ...