The principles of physiology : applied to the preservation of health, and to the improvement of physical and mental education . emoving the integuments, breast-bone, and part of the ribs. The sketch is ratherrude, but it will serve the purpose. The letters R Land L L mark the right and left lungs, with H theheart lying between them, but chiefly on the leftside. V is an inaccurate representation of thelarge blood-vessels going to the head, neck, andsuperior extremities. Liv is the liver, lying inthe abdomen or belly, and separated from thechest by the arched fleshy partition D D, calledthe diap
The principles of physiology : applied to the preservation of health, and to the improvement of physical and mental education . emoving the integuments, breast-bone, and part of the ribs. The sketch is ratherrude, but it will serve the purpose. The letters R Land L L mark the right and left lungs, with H theheart lying between them, but chiefly on the leftside. V is an inaccurate representation of thelarge blood-vessels going to the head, neck, andsuperior extremities. Liv is the liver, lying inthe abdomen or belly, and separated from thechest by the arched fleshy partition D D, calledthe diaphragm or midriff. The stomach appears on STRUCTURE OF THE LUNGS. the other side, marked St, but both it and the liverare removed a little from their natural situation. Gis the gall-bladder. Ill are the various parts of theintestinal canal through which the food is passed onits vv^ay from the stomach, by what is called the pe-ristaltic or vermictdar molon of the bowel, one circleof fibres narrowing after another, so as to propel itscontents slowly but steadily, and resembling in somedegree the contraction of a common 170 STRUCTURE OF THE LUNGS. The substance of the lungs consists of bronchialtubes, air-cells, blood-vessels, nerves, and cellularmembrane, or parenchyma. The first are merelycontinuations and subdivisions of the windpipe, andserve to convey the external air to the air-cellsof the lungs. The air-cells constitute the chief partof the pulmonary tissue, and are in one sense theterminations of the smaller branches of the bron-chial tubes. When fully distended, they are so nu-merous as in appearance to constitute almost thewhole lung. They are of various sizes, from the20th to the 100th of an inch in diameter, and arelined with an exceedingly fine thin membrane, onwhich the minute capillary branches of the pulmo-nary arteries and veins are copiously ramified ; andit is while circulating in the small vessels of thismembrane, and there exposed to the air, that theblo
Size: 1281px × 1950px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookpublish, booksubjectphysiology, bookyear1835
