A Text-book of anatomy by American authors - Softcover

Gerrish, Frederic Henry

Softcover

ISBN 10: 1130020215 ISBN 13: 9781130020212

Verlag: RareBooksClub.com, 2012

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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. 1902 Excerpt: ...mediastinal, and pericardial branches. Variations in the Superior Vena Cava and Brachio-cephalic Veins.--These are mostly due to a persistence of the left duct of Cu vier of the foetus, which may form a left superior vena cava. This descends from the commencement of the left brachiocephalic vein, in front of the aortic arch and the root of the left lung, to the heart, where it is continued in the usual position of the coronary sinus to open into the right auricle. In such cases the usual left brachio-cephalic vein may persist as a small communicating branch between the right and left superior vense cava?, or it may be altogether wanting. In a few cases, besides those of transposition of the viscera, the superior vena cava is found on the left side, the right brachiocephalic vein taking a transverse course similar to that usually taken by the left. VEINS OF THE HEAD AND NECK. I. Veins of the Surface of the Cranium and Face (Fig. 532). A. ANTERIOR REGION. The superficial veins of the face and the fore part of the cranium and the deep veins of the face unite to form two trunks, the facial and the temporo-maxillary veins, while the occipital and posterior auricular veins collect the blood from the hind part of the scalp. Valves are generally absent in the veins of the head and neck, except at the lower end of the internal and external jugular veins. The Facial Vein (anterior facial) collects the blood from the fore part of the face and scalp. It commences at the side of the nose, on a line with the lower margin of the orbit, as the direct continuation of the angular vein. It is less tortuous than the facial artery, posterior to which it passes downward and outward to and around the lower border of the jaw, in front of the masseter muscle. Below the lower border...

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• Verlag: RareBooksClub.com
• Erscheinungsdatum: 2012
• ISBN 10: 1130020215
• ISBN 13: 9781130020212
• Einband: Tapa blanda
• Anzahl der Seiten: 392