subdivision of tube
http://purl.obolibrary.org/obo/UBERON_0013522
http://purl.obolibrary.org/obo/UBERON_0000464
http://purl.obolibrary.org/obo/UBERON_0000060
http://purl.obolibrary.org/obo/UBERON_0000025
UBERON:0013522
http://purl.obolibrary.org/obo/UBERON_0000064