The portion of the small intestine that attaches to the cecum is the Ileum.
Hence Option (b) is correct.
With a length of almost 1.8 m(6 feet), the ileum is the section of the small intestine that is the longest.
Compared to the jejunum, it is thicker, more vascular, and has more advanced mucosal folds.
At the ileocecal sphincter, the ileum connects with the cecum, the first segment of the large intestine (or valve).
The small intestine's coiled tube is separated into three sections. These are the duodenum, jejunum, and ileum, arranged proximally (at the stomach) to distally.
The 25.4 cm (10 in) long duodenum, which starts at the pyloric sphincter, is the shortest section.
The jejunum connects the duodenum to the ileum and is roughly 0.9 m (3 feet) long (in life). The jejunum and the ileum, the last section of the small intestine, do not have a distinct boundary.
Hence, The portion of the small intestine that attaches to the cecum is the Ileum.
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