The development of the arteries of the abdomen and their relation to the peritoneum / by C.B. Lockwood ; communicated by W.S. Savory.

  • Lockwood, Charles Barrett, 1856-1914.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: The development of the arteries of the abdomen and their relation to the peritoneum / by C.B. Lockwood ; communicated by W.S. Savory. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    3/16 (page 476)
    sidered first; although, it may be remarked that a great many of the events which are about to be mentioned are iu progress at the same time. The position of the stomach is indicated by an enlargement of the anterior portion of the mid-gut. This organ, like the remainder of the bowel, is fastened to the spine by a mesentery, and simply hangs suspended in the pleuro-peritoneal cavity (Diagram 1). This position is altered by the stomach turning upon its right side. The mesentery, or mesogastrium as it will be called in future, is implicated in this change; instead of descending vertically from the spine to the stomach, it becomes looped (Diagram 2). Owing to these movements of the stomach and mesogastrium the cavity which they partitioned becomes different. There is no longer a light and left division of the peritoneal sac, but a part in front and to the left of the stomach and mesogastrium, and a part behind and to the right. The space which is behind the stomach, and which has the mesogastrium for its left boundary, represents what afterwards is the lesser cavity of the peri- toneum. It need not be repeated that blood-vessels pass through the mesogastrium to the stomach, and are of necessity involved in the changes which have just been described. Their course, instead of being straight, forms a curve. The relations of these altered vessels to the subdivisions of the peritoneal cavity require to be noted; it is evident that to reach their destination they now pass round the left boundary of the future lesser sac. Diageam 2. S. Stomach. MO. Mesogastrium. All the changes which have been narrated occur at very early stages of development; subsequent events do not produce any great alterations. Later it will be seen that the stomach becomes less vertical, and its mesentery further modified ; but the changes which the mesogastrium undergoes are very striking. They have been fully b 2