I think that is the point.  There aren't any 'huge' reservoirs filling with
milk and waiting to be 'milked' (like the cow udder.)  The milk is made
further back in the breast and the oxytocin causes the little muscles around
the milk making cells to contract and push the milk into the ducts.
I would imagine the ducts dilate somewhat as the milk gets pushed out, but
not to extent that we see in old illustrations.  Anyone heard Prof. Hartmann
expound on this?  Do I have the right concept?  Thanks, Pat in SNJ

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