structurally , two units differ from the other six by having ( 1 ) densely packed microtubules in their dendritic outer segments , ( 2 ) dense a-tubules with arms in their ciliary segments , ( 3 ) a well-developed ciliary rootlet in their dendritic inner segments , and ( 4 ) desmosomal junctions between the dendritic inner segment and the inner enveloping cell , which contains a scolopale .
C0011703
desmosomal
C0007634
cell