Light microscope footage of an egg cell with two sperm cells. Only one sperm cell can penetrate the egg's outer layer and fertilise it. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clouds Hill Imaging |
Modell-Rechte: | nicht erforderlich |
Länge: | 27 Sekunden |
Seitenverhältnis: | 4:3 |
Restrictions: | - |