c. Organisms. Many microorganisms are found within the lumen or cavity of
the large intestines. Certain microorganisms are responsible for the production of
vitamin K. Depending on the type of food present, some species of microorganisms
produce various gases (flatulence). On occasion, pathogenic organisms may be
present and cause problems for the individual.
6-36. STORAGE OF FECES
Toward the lower end of the large intestines, the contents (feces) have become
relatively consolidated. This consolidated mass is retained (stored) mainly in the rectum
and the lower portion of the sigmoid colon.
At the appropriate time, the feces is passed out of the body (defecation). The
feces passes through the anal canal and anus. This is accomplished by the relaxation
of the anal sphincter muscles.