Animation of sperm cells attempting to fertilise a human egg (ovum). Fertilisation occurs when the sperm's genetic material (deoxyribonucleic acid, DNA) fuses with the egg's DNA, forming a zygote. Only one sperm cell may penetrate the egg's outer layer, as after that it becomes impervious to other sperm. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Take The Wind |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Länge: | 14 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |