Sperm cells have the role of reaching and penetrating the ovum to fertilize it. They move at the rate of approximately.04 inches (one millimetre) per minute and their life span in the uterus is 72 hours on average. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / QA International |
Bildgröße: | 3278 px × 1911 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |