Unsaturated  fats  have one or
   more double bonds.
<P>
   The mostly cis double bonds cause the molecule to <A ClAsS=MIZ Href="../../..//med/omega-3.html" oNClick="popurlts('../../..//med/omega-3.html',758,465);txtcolor('fat-unsaturated1','gray');return false;" Id=fat-unsaturated1 ClAsS=MIZ>bend.</A>
<P>
   Unsaturated  fats  pack  loosely and are usually liquid (oils) at room
   temperature.
<P>
   However,  trans  double  bonds  can  cause  a  Lipids to behave like a
   saturated fat.
<P>
   Review:  <A ClAsS=MID Href="../../../med/Vid/Campbell8e/05_Animations/05_11Fats_A.swf" oNClick="popurlt('../../../../med/Vid/Campbell8e/05_Animations/05_11Fats_A.swf');txtcolor('fat-unsaturated3','gray');return false;" Id=fat-unsaturated3><iMg sRc="/images/shockwave.gif" aLt='' boRDer=0></A>