this observation constitutes evidence in favour of the view that diphyllobothrium latum , attached to the proximal portion ( jejunum ) of the intestine , absorbs the vitamin b12 contained in the food , thus preventing vitamin bound to the intrinsic factor of the gastric juice from reaching the receptors in the distal portions of the small intestine of the host .
C0021853
intestine
C0021852
small intestine