Describe the formation of the gut and the body cavities
Describe the formation of the gut and the body cavities
The gut also called the digestive tract is the organ system of the body that is principally accountable for digestion absorption of the food and body cavities are the spaces present in the body that are not occupied by the internal organs.
The endoderm that lines the yolk sac gives rise to the gut. The development of the primitive gut occurs at the time of the 3rd to 4th week. The gut is primitively comprised of three sections these include the foregut, midgut and one is hind gut. The foregut is responsible for forming the esophagus, stomach, liver, pancreas, proximal duodenum. The hindgut gives rise to one by the third part of the transverse colon, descending colon, sigmoid colon and superior anal canal. The midgut from distal duodenum, jejunum, ileum, cecum, appendix, ascending colon and two by the third part of the transverse colon.
By the end of 3rd week, the intraembryonic primitive coelom that is formed in the lateral and cardiogenic mesoderm approximately in the fourth week of development as the embryos form folding and this coelom cavity starts dividing to form pericardial, pleural and peritoneal embryonic body cavities.
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