With a wider vessel, the Doppler shift is broadened since there will now be {HEAD ~ blood cells} travelling at {TAIL ~ different velocities} across the diameter of the vessel 
With a wider vessel , the Doppler shift is broadened since there will now be { HEAD ~ blood cells } travelling at { TAIL ~ different velocities } across the diameter of the vessel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH