Surface of amnion. Scanning electron micrograph (SEM) of the epithelium of the amnion (the sac that protects the embryo),showing secretory epithelial columnar cells. These secretory cells are covered by a vast number of microvilli and secrete amniotic fluid. Amniotic fluid is the watery liquid that surrounds and cushions a growing embryo within the amnion. After the embryo has become a foetus (at 8 weeks),the amniotic fluid enables it to move freely without the walls of the uterus being too tight against its body | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3050 px × 4066 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |