Fertilisation of a human egg
Fertilisation of a human egg. Only one sperm makes it. Once that sperm has penetrated the egg, various changes prevent other sperm from entering. Nuclear material from sperm and egg mingle and the cell divides.
Animation ID: Fertilization_63_1920
copyright Russell Kightley
Animation resolution: 1920x1080 pixels @ 30.0 fps, ~19.2 Mbits/s