Anatomy and physiology : designed for academies and families . -resent ? What is the length of the small intestines ? How divided? Whatis said in regard to the duodenum ? Where do the pancreatic and choledo-chns ducts open ? What is said of the jejunum ? Its color ? What is saidof the ileum ? 12 134 ANATOMY AND PHYSIOLOGY. the termination of the one, or the commencement of theother. The ileum terminates in the right iliac fossa, byopening into the colon, at an obtuse angle. This opening iscalled the ilio-colic valve, as it prevents the passing of sub-stances from the colon into the ileum. The
Anatomy and physiology : designed for academies and families . -resent ? What is the length of the small intestines ? How divided? Whatis said in regard to the duodenum ? Where do the pancreatic and choledo-chns ducts open ? What is said of the jejunum ? Its color ? What is saidof the ileum ? 12 134 ANATOMY AND PHYSIOLOGY. the termination of the one, or the commencement of theother. The ileum terminates in the right iliac fossa, byopening into the colon, at an obtuse angle. This opening iscalled the ilio-colic valve, as it prevents the passing of sub-stances from the colon into the ileum. The jejunum and ileumare surrounded above and at the sides by the colon. The small intestines have three membranes or coats; theouter or serous, the middle or muscular, and the internal ormucous coat. This last is thrown into folds or valves, namedthe valvuhe conniventes. In consequence of this valvular ar-rangement, the mucous membrane is more extensive than theother tissues, and gives a greater extent of surface with whichthe aliment comes in contact. Fig. Fig. 97. Represents the valvulse conniventes of the internal surface of the smallintestines. There are embedded under the mucous membrane an im-mense number of minute glands, named the glands of Peyerand Brunner. There are, likewise, upon the mucous coat, animmense number of piles, like those upon velvet; hence thismembrane is named the villous coat. The lacteals are minute vessels, which commence in thevilli, upon the mucous surface of the small intestines. Fromthe intestines, they pass between the membranes of the mesen-tery to small glands, which they enter. The first range ofglands collects many small vessels, and transmits a few largerbranches to a second range of glands. From the secondrange, the lacteals, diminished in number and increased insize, proceed to the enlarged portion of the thoracic duct,named the receptaculum chyli, into which they open. Can the precise termination of each he distinguished ? By what are
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
