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Profile view of somewhat older human embryo with the alimentary canal in longitudinal section, and showing five arterial arches. The sharp curve of the trunk of the embryo towards the yolk-sac is normal at this period of development. Jones Quain (November, 1796 - January 31, 1865) was an Irish anatomist, professor of Anatomy and Physiology in the University of London, and author of Elements of Anatomy. The first edition was published in 1828 and it quickly became a standard text-book in English-speaking countries.
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