Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . transmissionof food to the small„ „ . o intestines. The Fig. 33.—A Section of the Stomach.—a, the oesophagus; o o i 6, the cardiac orifice ; c, the great end of the stomach; d, its IOrm OI the StOHl-lesser or pyloric end; d% the pyloric orifice; e, the lesser i j ,i curve; /, the greater curve; g, the rugae or wrinkles of the acJl &Ua the pOSl-mucous membrane; A, the pylorous; »,j, the duodenum, +• n •,
Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . transmissionof food to the small„ „ . o intestines. The Fig. 33.—A Section of the Stomach.—a, the oesophagus; o o i 6, the cardiac orifice ; c, the great end of the stomach; d, its IOrm OI the StOHl-lesser or pyloric end; d% the pyloric orifice; e, the lesser i j ,i curve; /, the greater curve; g, the rugae or wrinkles of the acJl &Ua the pOSl-mucous membrane; A, the pylorous; »,j, the duodenum, +• n •, or first portion of the small intestine; k, the duct through llOn OI ltS Open-which the bile and pancreatic juice are poured into the , duodenum. J l mgs are represent- ed in fig. 33. 164. The stomach possesses three coats—the outer orserous, the middle or muscular, and the inner or mucouscoats. What do we observe by a comparative view of the stomach in differentanimals? Describe the human stomach. How is it placed? What is itsaverage capacity in the adult ? How many openings has it, and what are theycalled? How many coats does the stomach possess, and what are they?. DIGESTION. 81 165. The serous coat is the same as the external coat ofall the organs which are not exposed to the air. Its useis to secrete a fluid which lubricates the surface of theorgans, and prevents friction between them. 166. The muscular coat is composed of numerous mus-cular fibres, such as we see in lean meat. These fibre?possess great power of contraction, being drawn up andstretched out again like India-rubber without of these fibres run lengthwise of the organ, somewind around it in the form of rings, and others run ob-liquely across it. By the alternate contracting and relaxingof these fibres, a great variety of motion is produced duringthe process of digestion, causing the food to be rolledabout and moved successively over every portion of theinner or mucous coat. In the a
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphysiologicalprocess
