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 Authors' Circular The Authors' Circular The Authors' Circular was a short-lived monthly publication of 16 pages running from January to April 1898. It was subtitled the "Official Organ of the English School of Journalism". It aimed to "foster business relations between those who write and those who publish," reflecting the increased professionalization of journalism. Advice on pitching to editors and defending intellectual property, gossip about the literary scene, insight into the means by which editors selected copy for publication, and a correspondence section in which such issues were discussed made up the bulk of the magazine. The syllabus for the English School