. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCULAR FIBRES OF THE STOMACH ; EXTERNAL AND MIDDLE LAYERS. A, Fibres of the external layer enveloping the left sac; B, Fibres of the middle plane in the right sac; c, Fibres of the ceso- phagus. DEEP AND MIDDLE MUSCULAR LAYERS EX- POSED BY REMOVING THE MUCOUS MEM- BRANE FROM AN EVERTED STOMACH. A, Deep layer of fibres enveloping the left sac; E, Fibres of the middle plane which alone form the muscular layer of the right sac; C, Fibres of the oesophagus. fhe circular fibres. The loops nearest the oesophagus embrace the
. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCULAR FIBRES OF THE STOMACH ; EXTERNAL AND MIDDLE LAYERS. A, Fibres of the external layer enveloping the left sac; B, Fibres of the middle plane in the right sac; c, Fibres of the ceso- phagus. DEEP AND MIDDLE MUSCULAR LAYERS EX- POSED BY REMOVING THE MUCOUS MEM- BRANE FROM AN EVERTED STOMACH. A, Deep layer of fibres enveloping the left sac; E, Fibres of the middle plane which alone form the muscular layer of the right sac; C, Fibres of the oesophagus. fhe circular fibres. The loops nearest the oesophagus embrace the stomachal opening of that canal like a cravat. It is to be remarked that the fibres of this deep layer intersect those of the superficial plane; the former passing from the left to the right sac, in inclining downwards towards the great curvature, while the latter are directed to the right and slightly upwards. From this arrangement it results, as a glance at Figs. 185,186 will show: 1, That the right sac has only a single muscular plane; 2, That, on the • contrary, the left sac has three, all of which concur in propelling the aliment that has accumulated in the left or oesophageal compartment into the right, or true stomach. 8. Mucous membrane.— Independently of the general characters notified in the interior of the stomach, it has to be remarked that the gastric mucous membrane is united to the preceding tunic by an expansion of connective tissue; though it adheres but feebly throughout the right sac, especially towards the greater curvature, where it is thickest; and that it has no ridges in the left sac, though in the right they are always present, even when the organ is inflated. On the surface of this membrane are seen microscopical apertures {alveoli), the orifices of the excretory ducts of glands; these are rare in the left sacj. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
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