Dr. Dan Richman discovered extraterrestrial fat cell remains in
meteorite Murchison as shown in Fig. 8 at
http://astrobiology.jhu.edu/wp-content/uploads/2011/02/2011-2-2-prebioticlipidsintro1.pdf

All fat cells (adipocytes) are filled nearly completely with lipids
(fat globules, also called lipid droplets) as shown in this TEM:
http://tanyapeale.com/blog1/wp-content/uploads/2011/01/adipocyte1.gif

Lipid droplets differ from red blood cells in that lipid droplets can
have different sizes in an animal while red blood cells have same size
in an animal.