The ileum is the longest and final section of the small intestine, crucial for absorbing vitamin B12, bile salts, and remaining nutrients. It plays a key role in digestion, immunity (via Peyer’s patches), and smooth transfer of contents to the large intestine. Know its structure, function, and clinical importance in one glance! #Ileum #DigestiveSystem #HumanAnatomy #BiologyFacts #GKforExams | InfoPic Notes