Human sperm swimming, Interference contrast

Single Human sperm swimming in semenal plasma, Interference contrast

Human sperm, single sperm swimming

Human sperm swimming, Interference contrast

Human sperm, medium close up lots sperm swimming around, includes deformed

Human sperm swimming with track, includes two tailed Human sperm, Interference contrast

Human sperm, single sperm swimming, head looks deformed

Single Human sperm swimming, Interference contrast

Human sperm with two tails swimming ineffectually

Human tongue bacteria from Human tongue scrape. Recorded using Phase Contrast illumination, horizontal field of view 100 micrometres.

Human tongue bacteria from Human tongue scrape. Recorded using Phase Contrast illumination, horizontal field of view 50 micrometres.

Human tongue bacteria from Human tongue scrape. Recorded using Phase Contrast illumination, horizontal field of view 50 micrometres.

Moving across clear freshwater sample to view Spirochaeta bacteria moving around algal cells, Phase Contrast

Filamentous and motile bacteria next to sloughed cell from the surface of a Human tongue. Recorded with Nomarski Differential Interference Contrast with a horizontal field of view 130 micrometres.

Human sperm

Human sperm swept along in ejaculate

Human sperm, swimming

Human sperm, single sperm swimming, a few others around

Human sperm swept along in ejaculate

Single Human sperm swimming, big close up, Interference contrast

Single Human sperm swimming, big close up, Interference contrast

Human sperm around egg-like sphere

Human sperm, swimming

Single Human sperm swimming against the flow of semenal plasma, Interference contrast