Rat embryo. Light microscopy footage of a 12.5-day-old rat embryo. Its heart is beating at lower right. An embryo forms in stages following the fertilisation of a female sex cell (ovum) by a male sex cell (sperm). Gestation (the period of development in the uterus) in rats takes 22 days. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clouds Hill Imaging |
Modell-Rechte: | nicht erforderlich |
Länge: | 30 Sekunden |
Seitenverhältnis: | 4:3 |
Restrictions: | - |