Human Fetus, 6 Months
Diagram showing outline of the organs of circulation in fetus of 6 months. RA, right auricle of the heart; RV, right ventricle; LA, left auricle; Ev, Eustachian valve; LV, left ventricle; L, liver; K, kidney; I, portion of small intestine; a, arch of aorta; a', its dorsal part; a'', lower end; vcs, superior vena cava; vci, inferior vena cava where it joins the right auricle (atrium); vci', its lower end; s, subclavian vessels; j, right jugular vein; c, common carotid arteries; four curved dotted arrow lines are carried through the aortic and pulmonary opening, and the auriculo-ventricular orifices; da, opposite to the one passing through the pulmonary artery, marks the place of the ductus arterioles; a similar arrow line is shown passing through the fossa ovales of the right auricle, and the foramen ovale into the left auricle (atrium); hv, hepatic veins; vp, vena portae; x to vci, the ductus venous; uv, umbilical vein; ua, umbilical arteries; uc, umbilical chord cut short; i, i', iliac vessels. 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. 10th edition, 1896.
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