using an in vivo perfusion technique we compared transport of calcium in segments of the proximal ( duodenum + jejunum ) and distal ( ileum ) small intestine and in the cecum + colon of suckling ( 2-week old ) , weanling ( 3-week-old ) and adolescent ( 6-week-old ) rats .
C0022378
jejunum
C0021852
small intestine