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The interior of the anal canal and lower part of the rectum. Showing the column of Morgagni and the anal valves between their lower ends. The columns were more numerous in this specimen than usual.

Rectum and Anal Canal

The interior of the anal canal and lower part of the rectum. Showing the column of Morgagni and the…

The anal canal and rectum in a fetus. A, aged 4 to 5 months; B, 6 moths; C, 9 months. In each he anal canal is distinctly marked off from the rectum proper; the column of Morgagni and the rectal valve are distinct.

Rectum and Anal Canal in Fetus

The anal canal and rectum in a fetus. A, aged 4 to 5 months; B, 6 moths; C, 9 months. In each he anal…

The stages of the rectum and the anal canal on mesial section.

Rectum and Anal Cavity

The stages of the rectum and the anal canal on mesial section.