Umbilical cord diameter. This diameter decreases rapidly within the placenta. The fully patent umbilical artery has two main layers: an outer layer consisting of circularly arranged smooth muscle cells and an inner layer which shows rather irregularly and loosely arranged cells embedded in abundant ground substance staining metachromatic. The smooth muscle cells of the layer are rather poorly differentiated, contain only a few tiny myofilaments and are thereby unlikely to contribute actively to the process of post-natal closure. The umbilical cord contains Wharton's jelly, a gelatinous substance made largely from mucopolysaccharides which protects the blood vessels inside. It contains one vein, which
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