Embryo 40 Day Old with Visible Spinal Cord
Computer Generated Image from Micro-MRI, actual size of embryo = 8.0 mm - This image presents a dorsal view of the developing embryo at six weeks. The age is calculated from the day of fertilization. The spinal region is highlighted in yellow. The spinal cord has grown thicker during embryonic development. The two upper body limbs have elongated and the lower portions have begun to develop into hand plates which serve as the templates for hand development.