Time lapse movie of meiosis II in spermatocytes of the Locust Psophus stridulus showing telophase and the early spermatid stage. This is a historic movie made in the early 40s by Kurt Michel of the ...

During the differentiation of sperm most cellular proteins and organelles are degraded as they are no longer needed. Actin filaments in the cell help to collect and move cytoplasmic material in maturi...

Figure 337 from Chapter 14 (Sperm Flagellum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A transverse section through a portion of a sperm bundle of the newt, Notophthalmos viridescens at the level...

Figure 340 from Chapter 14 (Sperm Flagellum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Cross sections of sperm tails of a caddis fly illustrate differences between the organization of the insect ...

Figures 331 (left) and 332 (right) from Chapter 14 (Sperm Flagellum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Left, longitudinal section of midpiece from sperm of the suni antelope; right, longi...

Phosphorus has a characteristic electron energy loss with an edge at 160 eV. The Zeiss 902 electron microscope permits images to be recorded at different energy losses which can be digitized and proce...

Phosphorus has a characteristic electron energy loss with an edge at 160 eV. The Zeiss 902 electron microscope permits images to be recorded at different energy losses which can be digitized and proce...

At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

Time lapse movie of meiotic metaphase and anaphase in spermatocytes of the Locust Psophus stridulus. Two sequences are shown, each continuing through telophase to the start of cytokinesis. In addition...