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
Women in the Bible saw her, he thought she was a prostitute, for she had covered her face. Not realizing that she was his daughter-in-law, he went over to her by the roadside and said, 'Come now, let me sleep with you'."(Genesis 38:14) He said he would give her something in return and she asked for a pledge, accepting his staff and his seal with its cord as earnest of later payment. So Judah slept with her and she became pregnant. Then she went home and put on her widow's weeds again. Months later when it was discovered she was pregnant, she was accused