Elements of anatomy and physiology : prepared for the use of schools and colleges / by W. S. W. Ruschenberger ; from the text of Milne Edwards and Achille Comté.

  • Milne-Edwards, H. (Henri), 1800-1885.
Date:
1852
Catalogue details

Licence: Public Domain Mark

Credit: Elements of anatomy and physiology : prepared for the use of schools and colleges / by W. S. W. Ruschenberger ; from the text of Milne Edwards and Achille Comté. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    19. This organ is enveloped in a double, membranous sac, catted pericardium, and is suspended in the pericardium by the vessels which arise from its superior and enlarged entremity; but it does not adhere at any other point of its surface to the neigh- bouring parts. 20. The substance of the heart is almost entirely fleshy; it is a hollow muscle, the cavity of which communicates with the arte- ries and veins. 2L In man and all the mammalia, as well as birds, it has four distinct cavities. A thick, vertical partition ap divides it into two halves, each one forming two cavities, one above the other; a ventricle, and an auricle. (Fig. 6.) 22. The two ventricles occupy the inferior part of the heart, and do not communicate with each other, but each one opens into the auricle above it. 23. The cavities of the left side of the heart contain arterial blood, and those of the right side, venous blood. 24. The vessels which convey arterial blood into all the organs take their origin from the left ventricle of the heart, Explanation of Fig. 6.—The heart opened to show the cavities in the in- terior of this organ.—od, right auricle of the heart,—vdt Tight ventricle of the heart,—og, left auricle of the heart,—vg, left ventricle of the heart,— vcs. and vci, superior and inferior vense cavee, emptying into the right auricle of the heart,—ap, pulmonary artery going from the right ventricle to the lungs,—vp, pulmonary veins passing from the lungs to the left auricle of the heart,—aa, the aorta,—o, left auriculo-ventricular opening,—o\ right auriculo-ventricular opening. The arrows point out the direction of the flow of the blood in the different vessels. 19. Has the heart any covering proper to it? How is it suspended in the pericardium? Does the heart adhere to the surrounding parts ? 20. What is the substance of the heart ? Is the heart solid ? 21. How many cavities has the heart? How is it divided ? What are the cavities of the heart called ? 22. What part of the heart is occupied by the ventricles? Do the ven tricles communicate with each other? Dn they communicate with the auri- cles ? How is the auricle situated in regard to the ventricle ? 2.1. What kind of blood is contained in the cavities of the left side of the heart? In which side of the heart is found the venous blood ? 24. From what part of the heart do these vessels arise which carry arte rial blood ? What is the name of the great arterial trunk as it arises from ibe heart?