. A text-book of radiology . s line suits ourpurpose better. As to the shape of the stomach, we may say the upperthird is pyrif orm and filled with gas, while the lower two-thirds is tubular, the diameter varying with the amountof food present. As to its position, the upper two-thirdsis almost vertical, and the lower third is nearly pylorus may be to the right of the middle line, andit should be on a level with the lower pole of the , however, we find that the lower pole of thestomach is below the umbilicus in average individuals,and it is also below the pylorus.
. A text-book of radiology . s line suits ourpurpose better. As to the shape of the stomach, we may say the upperthird is pyrif orm and filled with gas, while the lower two-thirds is tubular, the diameter varying with the amountof food present. As to its position, the upper two-thirdsis almost vertical, and the lower third is nearly pylorus may be to the right of the middle line, andit should be on a level with the lower pole of the , however, we find that the lower pole of thestomach is below the umbilicus in average individuals,and it is also below the pylorus. We may regard this asa very mild decree of gastroptosis, in an academical senseonly, and of no practical or clinical importance; in fact,the milder degrees of gastroptosis are not at all incom-patible with a functionally perfect digestion. Theimportant thing is that the tone of its muscular coatsshould be good. It is this tonic condition that enablesthe stomach to maintain its tubular form and hold up its NORMAL STOMACH. 171. Fig 61. Normal, contents against gravity. It is also this tonic state thatgives the stomach the form we see in life; it is theabsence of it that gave us such wrong ideas of its properform because they were based on observations made onthe operating table or post mortem. See Fig. 61. Peristalsis may be seen imme-diately after the food is waves are seen to pass alongthe greater curvature every fifteenor twenty seconds, gaining in depthand vigour as they approach thepyloric end where the muscularcoat is strongest. Foods tend toarrange themselves according totheir specific gravity, and the oldidea of churning of the contentsis quite a fallacy. (See Fig. 62). All the movements of thestomach are less vigorous whenthe individual reclines. If the subject is a thin indi-vidual it is possible to get a goodview of the stomach from side toside. It then shows as a longcurved shadow with the convexityupwards and forwards. The upperend is in the centre of the b
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