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Profile view of human embryo of about 3 to 4 weeks showing the principal arteries and veins. Wd, Wolffian duct opening into cloaca; I, II, III, IV, V, the arterial arches spring from b.a, bulbus arterioles; p, pulmonary artery; d.C, duct of Cuvier; ch, notochord. 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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