ParametricPlot

ParametricPlot[{f_xf_y}, {uuminumax}]
plots parametric function f with paramater u ranging from umin to umax.
ParametricPlot[{{f_xf_y}, {g_xg_y}, ...}, {uuminumax}]
plots several parametric functions f, g, ...
ParametricPlot[{f_xf_y}, {uuminumax}, {vvminvmax}]
plots a parametric area.
ParametricPlot[{{f_xf_y}, {g_xg_y}, ...}, {uuminumax}, {vvminvmax}]
plots several parametric areas.