An elementary description of the anatomy and physiology of the brain, viscera of the thorax, abdomen, &c. ... / by W. Simpson.

  • Simpson W.
Date:
1826
Catalogue details

Licence: Public Domain Mark

Credit: An elementary description of the anatomy and physiology of the brain, viscera of the thorax, abdomen, &c. ... / by W. Simpson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    113. Into tlic grooves which separate the lungs into lobes the pleura enters. 114. That part of the lungs which is fixed to tire spine is called the root, and here the great vessels enter. 115. The lungs are composed or made up of arteries, veins, nerves, absorbents, and air celts lined, by a con- tinuation of the mucous membrane of the trachea, and a structure which connects all these together, called parenchyma. llfi. The Bloodvessels of the lungs may be divided into functional and nutrient. 117. The functional are tire pulmonary artery and four pulmonary veins. 118. The pulmonary artery arising from the right ventricle of the heart divides into a branch to each lung, and the ramifications form a network in the air cells of the lungs, and terminate in the commencement of the pulmonary veins. 119. The pulmonary veins unite into four trunks, tiro from each lung ; which terminate in the left auricle of the heart. 120. The nutrient arteries of the lungs are derived from the descending thoracic aorta, and are called bronchial. 121. The fust given off is called the right bronchial, which accompanies the ramifications of the right bron- chial tube to the right lung. 122. The second is called the left bronchial, which supplies in like manner the left lung 123. The third is called the common bronchial, which divides into two—one to the right and one to the left lung. 124. The thoracic aorta gives off some branches to the oesophagus. 125. And, lastly, it gives off nine or ten intercostal arteries on each side,which run along the under margin of each rib; supplying the intercostal muscles, pleura, and muscles oh the sides of the chest; the two upper intercostal spaces are supplied by a branch from the subclavian on each side. 12(i. The blood is returned by veins corresponding to the branches of the arteries; the right intercostal veins,
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