B axonemal microtubule
An incomplete microtubule containing 10 protofilaments that fuses with a complete microtubule called A tubule (containing 13 protofilaments) to form an axonemal outer doublet.
GO:0005879
axonemal microtubule
is_a
GO:0097545
axonemal doublet microtubule
part_of
B tubule
broad