. The anatomy of the horse, a dissection guide. Horses. DISSECTION OF THE BACK AND THORAX. 101 cone lies in front, and is bounded by the body of the 1st dorsal vertebra above, and at the sides by the 1st ribs, which meet below. The trachea, the oesophagus, the bloodvessels of the fore limb and head, and many important nerves are transmitted through this opening. On transverse section, the thorax is not circular, as a cone is, but gives a heart-shaped outline. It looks as if it had been squeezed laterally; and it might be described as having a roof, formed by the dorsal vertebrae and the ribs a
. The anatomy of the horse, a dissection guide. Horses. DISSECTION OF THE BACK AND THORAX. 101 cone lies in front, and is bounded by the body of the 1st dorsal vertebra above, and at the sides by the 1st ribs, which meet below. The trachea, the oesophagus, the bloodvessels of the fore limb and head, and many important nerves are transmitted through this opening. On transverse section, the thorax is not circular, as a cone is, but gives a heart-shaped outline. It looks as if it had been squeezed laterally; and it might be described as having a roof, formed by the dorsal vertebrae and the ribs as far as their angles; a floor, much less extensive, formed by the sternum ; and lateral walls, formed by the ribs and intercostal muscles. Contents of the Cavity.—In point of size, the lungs are the most important organs in the thorax, the heart coming next. Besides these,. Flu. 6. 1. Cheat-wall; 2. Pleural, cavity o^sac ' 8 L,„g ^ 4 M "^^^^^^^^^ r(^^it5!^aVlia!1rcTE.«^B-fo^ Fold of^right^leJal menibrane enveloping posterior vena cava. the cavity lodges the main arterial and venous trunks, the thoracic duct, the trachea, the oesophagus, and many important nerves, all of which will be examined in due course. The Pleura. Each half of the thorax possesses a serous membrane termed the pleura. Like other serous membranes, the pleura is arranged in the form cf a shut sac, and consists of a visceral and a parietal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McFadyean, John, Sir, 1853-. Edinburgh and London, W. & A. K. Johnston, Ltd.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecthorses, bookyear1884
