Placental villi. Coloured scanning electron micrograph (SEM) of a freeze fracture through a placenta showing projections (centre) from the interior of the placenta known as chorionic villi. The villi contain foetal blood vessels and are bathed in maternal blood. A large blood vessel (oval) is at upper right. The placenta surrounds the foetus in the womb. It provides the foetus with nourishment,eliminates waste products and exchanges respiratory gases. Villi provide a large surface area for these exchanges | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4000 px × 3009 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |