Identify the correct statement with reference to the human digestive system.
Option: 1 The ileum opens into the small intestine.
Option: 2 Serosn is the innermost layer of the alimentary canal.
Option: 3 The ileum is a highly coiled part.
Option: 4 The vermiform appendix arises from the duodenum.
The ileum is a highly coiled part, so this is the correct statement.