These can be called macromolecules. Cellulose is another polysaccharide of glucose and is present in plant cell walls.
Chitin is a polysaccharide found in insect exoskeletons.
This head group is hydrophilic and chemically reactive. FA's are linked to other molecules through this head group. Other contain double bonds and thus are unsaturated. Double bonds put kinks in the hydrocarbon chain and the chains are not able to pack together as well. Animal cells have cholesterol packed between the kinks left by the unsaturated hydrocarbon chains, this acts to stiffen the lipid bilayer.