Umbilical cord from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo. The cord is not directly connected to the mother's circulatory system, but instead joins the placenta, which transfers materials to and from the maternal blood without allowing direct mixing. The length of the umbilical cord is approximately equal to the crown-rump length of the fetus throughout pregnancy. The umbilical cord in a full term neonate is usually about 50 centimeters (20 in) long and about 2 centimeters (0.75 in) in
The Creation of Adam the brain stem, the frontal lobe, the basilar artery, the pituitary gland and the optic chiasm. Alternatively, it has been observed that the red cloth around God has the shape of a human uterus (one art historian has called it a "uterine mantle") and that the scarf hanging out, coloured green, could be a newly cut umbilical cord. Recently a group of Italian researchers published on "Mayo Clinic Proceedings" an article where the images of the mantle and the postpartum uterus were overlapped. According to Enrico Bruschini (2004), "This is an interesting hypothesis that presents the Creation scene as an