Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1832 Excerpt: ... LECTURE XXVI. DESCRIPTIVE ANATOMY OF THE ARTERIES. Ihe principle which I have adopted in the following description of the arteries, I have taken from the example of my friend Mr. Joshua Brookes, as it possesses considerable advantage in assisting the memory of the student. It is to consider the two principal arteries arising from the heart, as arterial trunks. The branches immediately given off from the systemic trunk, are named arteries, and numbered in the order of their succession. The branches from arteries, are named rami; branches from rami, ramuli; branches from ramuli, ramusculi; branches from ramusculi, ramifications; and their ultimate terminations, distributions. Before we commence a description of the anatomy of the arteries, it will be necessary again to take a view of the precise situation of the heart within the thorax, in order that its position in relation to the large arteries arising from it may be clearly understood. The heart is placed obliquely within the chest; its base being opposite to the fourth dorsal vertebra, partly resting upon the diaphragm; while its apex is directed obliquely downwards, forwards, and to the left, towards the interspace of the fifth and sixth ribs. With regard to the ventricles and auricles,--those of the right side are placed most anteriorly, and form the acute edge; while the left auricle and ventricle form the obtuse edge, and posterior part of the heart. The Pulmonary Arterial Trunk--already described with the organization of the lungs Vide Vol. III. p. 186J, is the first vessel seen in the natural position of the heart; arising from the upper and anterior part of the base of the right ventricle, where it conceals the origin of the aorta. The Aorta--the main trunk of the systemic distribution, arises from...
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