This is due to stimulation of vomiting center by some metabolites Vomiting

This is due to stimulation of vomiting center by some metabolites Vomiting very often ejects undesirable substances from the stomach and Thus, saves us from Them. However, persistent vomiting also causes loss of water (dehydration and H+ ions (alkalosis) with their attendant train of sequences. MOVEMENT OF THE SMALL INTESTINE 1. Introduction. 2. The movements the different types of movements, effects of nerves and hormones on them and conditions influencing them.3. Applied Physiology. Introduction The small intestine, beginning from the first part of the duodenum and ending in the ileocecal junction, normally maintains a tone After death. this Tone disappears and as a result. The length of The small intestine (as well as that of the large intestine) increases To great extent The length of the intestine in cadavers, therefore is no index of That in life. In addition to the tone three other movements are described classifically They are - (i) segmentations. (ii) pendular movements and (iii) peristalsis. These are on the basis of the animal experiments made by Cannon (of USA) as well as Starling and Bayliss (of Great Britain) who made their studies in the beginning of 20th century or in the last phased 19th century. In 1965 G. Friedman and his colleagues reported their studies on the movements of human srnall intestine. They introduced some new nomenclatures while describing them However, on the whole The movements are basically simlar to Those found by the earlier workers on the animals. THE MOVEMENTS Description and utility. (i) Segmentation or segmenting contractions were described by Cannon. In this movement, constrictions appear at several points in a portion of The intestine Therefore, that portion of the intestine is divided into several segments, each bounded by a ring of constriction on either side. Each segment is about 1 or 2cm long. Very soon a constriction ring appears in the middle of each segment but The previous constrictions now disappear. This process is repeated (fig.3.7.3) and the constriction rings again appear at the sites where they appeared