Human sperm cells. Coloured scanning electron micrograph (SEM) of human sperm cells or spermatozoa. These tiny male sex cells are produced in the test

---

Human sperm cells. Coloured scanning electron micrograph (SEM) of human sperm cells or spermatozoa. These tiny male sex cells are produced in the testes, and are responsible for fertilisation of the female egg (ovum). Each sperm has a rounded head which contains the male hereditary material (DNA) Some 300 million sperm are released by the male during ejaculation, while the female usually produces one large egg at a time. Only one sperm cell can fertilise the egg. Magnification: x2000 when printed at 10cm. wide.

---

Size: 4834px × 3615px
Photo credit: © ***DEPENDS ON PIC***/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, alga, algae, aquatic, background, biological, biology, blue, botanical, botany, chloroplast, chloroplasts, euglenid, euglenids, euglenoid, euglenoids, euglenophyte, euglenophytes, flagellates, flora, fresh, freshwater, green, micro-organism, micro-organisms, microorganism, microorganisms, nature, pellicle, photosynthetic, polarised, polarized, single-celled, unicellular, water