Embryo 44 Day Old Showing Hand Plate
Computer Generated Image from Micro-MRI, actual size of embryo = 13.0 mm - This right-sided image of an embryo developing during the seventh week has been manipulated so that the focus centers on internal organ systems. The age is calculated from the day of fertilization. The three major components of the brain can be seen. The forebrain is the largest portion and can be is visible near the front portion of the head region. The midbrain is the narrower part of the brain in the middle and the hindbrain connects with the spinal cord. The red-purplish circle seen in the head region is the developing eye. The nerve endings of the spinal cord are indicated in white. The heart is marked in bright red. One of the lungs seen is marked in yellow. The kidney organ is indicated in green. The thick red blood vessel is seen inside the umbilical cord, a transport mechanism for nutrients and wastes between embryo and mother.