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EB1911 Alimentary Canal Fig. 2.—Structure of small and large intestine...
Alimentary Canal Fig. 2.—Structure of small and large intestine and duodenum, from Encyclopædia Britannica 1911
EB1911 Alimentary Canal Fig. 3.—Valvulae Conniventes
Alimentary Canal Fig. 3.—Valvulae Conniventes, from Encyclopædia Britannica 1911