Identifier: outlinesofhumanp00hayw (find matches)
Title: Outlines of human physiology; designed for the use of the higher classes in common schools
Year: 1834 (1830s)
Authors: Hayward, George, 1791-1863
Subjects: Physiology
Publisher: Boston, Marsh, Capen & Lyon
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Tho cavity of the cliest laid open, to show tlie heart and lungs, oThe heart, bh The pericardium, cut open, c The aorta, thegreat artery of the lefr side, that distributes ihe blood to nil partsof the body, d The great Aein, called the descending vena cava,which, with the ascending, brings the blood to the rigiit auricle.6 The pleura or membrane that covers the lungs. the names of the parts with whose circulation they areconnected. The error arose with the ancients, whoseprejudices did not allow of human dissection, and who CIRCULATION OF THE BLOOD. 47 obtained their ideas of the circulating organs by thedissection of monkies, in whom the heart is somewhatdifferently placed than in man. The anterior or right side of the heart, as it is called,sends the blood to the lungs; the posterior, or left side,
Text Appearing After Image:
O The left ventricle, h The right ventricle. C «/Theaorta, the great artery that goes off (rom the left ven-tricle, g ki The arteries that are sent from the archof the aorta. A; The pulmonary artery, that goes fromthe right ventricle to the lungs. I I Hranclios of the pul-monary artery, going to the two sides of the lungs, m mThe pulmonary veins, which bring the blood back fromthe lungs to the left side of the heart, n The right auri-cle. 0 The ascending vena cava, q The descending :these two meet, and by their union, form the rigiit auricle.p The veins from the liver, spleen and bowels, s Theleft coronary artery ; one of the arteries which nourish theheart. sends it to the rest of the body. Each side of theheart is divided into two parts; the uppermost, whichis a membranous bag, is called, from its resemblance to 4S CIRCULATION OF THE BLOOD. an ear, auricle. Though membranous, it is not en-tirely destitute of muscular fibres, and is consequently-possessed of some contractile powers.

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