. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 314- STOMACH AND INTESTINE. rent, as that curved line which unites the car- diac and pyloric apertures (a, Jig. 245.). Fig. Diagram to show the general direction of movement impressed on the semifluid food in the diges stomach. ting a, real axis of the stomach, uniting its cardiac and pyloric apertures ; I, situation of the abnormal opening in St. Martin's case. (The arrows corre- spond to the peripherial current of advance, which is effected by peristalsis; and the central current of return, which is reflected fro
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 314- STOMACH AND INTESTINE. rent, as that curved line which unites the car- diac and pyloric apertures (a, Jig. 245.). Fig. Diagram to show the general direction of movement impressed on the semifluid food in the diges stomach. ting a, real axis of the stomach, uniting its cardiac and pyloric apertures ; I, situation of the abnormal opening in St. Martin's case. (The arrows corre- spond to the peripherial current of advance, which is effected by peristalsis; and the central current of return, which is reflected from the preceding at the pylorus.) (2.) The observations of Dr. Beaumont are as follows*:—"The bolus, as it enters the cardia, turns to the left, passes the aperture, descends into the splenic extremity, and fol- lows the great curvature towards the pyloric end. It then returns in the course of the smaller curvature, makes its appearance again at the aperture in its descent into the great curvature, to perform similar revolutions. These revolutions are completed in from one to three minutes; the bulb of the thermometer invariably indicates the same ; He is careful to add, that there is an admix- ture of the ingesta, which implies that the movement is not simply a revolution ; for that, if this were the case, " the central portions would retain their situation, until the outer or chymified part had passed into the duode- num.'^ Now in order to render the movement thus observed perfectly compatible with that above deduced, we have but to recollect the situation of the aperture from which the inspection of St. Martin's stomach was made. This was at the left extremity of the organ (b, fig. 245.). Whence it is obvious, that any backward movement along the real axis («), connecting the two orifices of the stomach, would be so near to the superior curved border, and so far from the point of view, that Dr. Beaumont could scarcely have avoided imputing to it t
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