The Calcutta Journal of Medicine; A Monthly Record of the Medical Auxiliary Sciences (27, No. 8) (English, French, Paperback)

Ce livre historique peut contenir de nombreuses coquilles et du texte manquant. Les acheteurs peuvent generalement telecharger une copie gratuite scannee du livre original (sans les coquilles) aupres de l'editeur. Non reference. Non illustre. 1908 edition. Extrait: ...in conjunction with the pancreas in the embryo, but in the adult permanently differentiated and responsible for the internal secretion. It was suggested by Laguesse that this alternation between acinar and islet tissue represented an alternation between the external and internal secretion, that the same cell at one time secreted into the gut, and at another into the blood. This view, however, according to Rennie, has now been abandoned. It is the object of this paper to revive this view, though in a somewhat modified form. We have examined the pancreas in the dog, cat, guinea-pig, bh-d, frog, and the cartilaginous fishes, and throngh the courteRy of Dr. Rennie have been alle to criticnllv examine his specimens of tlie teleoat fish. Although in each case the organ, especially with regard to islet tissue, presents many differences in detail, there is no doubt in our minds that the islet is a phase in the life-history of the acinus. The isolated islet of Rennie, consists of both tissues, and it is not difficult to imagine the origin of one from the other. In his paper he states that observers have not yet found islet tissue in elasraobranohs. We have examined the gland in fonr species, and in each case have found islets. Moreover, in no other type we have studied is the transition from acinus to islets so well marked. We have not time to enter now into a detailed description that we hope to publish shortly., At present we are rather concerned with the functional significance of such a change. It is best shown in the case of Musipui vulgaris. The acini, as usual, consist of cells divided into two zones, an outer basophil containing the nucleus, and an inner coarselygranular eosinophil. This...