GO:0070702

inner mucus layer

Details: 
The inner of two mucus layers secreted by epithelial cells in the colon; the inner mucus layer is firmly attached to the epithelium, is densely packed with a compact stratified appearance and is devoid of bacteria. [GOC:mah, GOC:mm2, PMID:18806221, PMID:19432394]
Evidence Code: 
IDA