Subject: Urgent Questions!
Wed, 15 Sep 1999 19:28:11 EDT

Whales force air through the nasal sacks in their respiratory system. They 
lack vocal cords, but have a vestigial larynx.  Air may also be passed over 
that, producing sounds.
As whales do not have vocal cords, sounds are produced internally.  The 
squeaking sounds made by a dolphin like Flipper, are produced by exhaling 
through the partially open nostril.  Clacking sounds may be made by the jaws.