LE TRANSIT DIGESTIF CHEZ LES MONOGASTRIQUES. II. — PHÉNOMÈNES MOTEURS ET MOUVEMENTS DES DIGESTA

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Abstract
Gastrointestinal transit was considered relative to the overall process of digestion. The interactions between motility, digestive secretions, intestinal absorption, cellular renewal and the digestive tract microflora were emphasized. Interrelationships between dietary supplies, nutritional requirements and functional digestive capacity were discussed. An attempt was made to gather and compare studies on digestive motor events, digesta movements and associated digestibility investigations on man, dog, cat, pig, rat, rabbit and horse. The gastrointestinal motor events were described on the basis of electromyographic studies. Two species exhibited particular characteristics: the rabbit, owing to duality in the fecal excretion and to cecotrophy and the horse, because of its excessively low gastric capacity. The processes controlling motility and digestive transit are very similar in humans, dogs, pigs and rats in the gastroduodenal area and a general scheme is proposed. The influences of various gastrointestinal hormones are not yet completely elucidated and controversy remains about the pylorus function. Numerous physiological and nutritional data were in accordance with regard to the many physicochemical variation factors dependent on the characteristics of the digesta. Especially in trials on pigs, these 2 approaches were developed simultaneously, whereas carnivorous animals were principally subjected to physiological studies and the rat, to nutritional studies.

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