ParametricPlot3D

ParametricPlot3D[{fx, fy, fz}, {u, umin, umax}] produces a three-dimensional space curve parametrized by variable u.

ParametricPlot3D[{fx, fy, fz}, {u, umin, umax}, {v, vmin, vmax}] produces a three-dimensional surface parametrized by u and v.

Examples

Space curve (helix):

ParametricPlot3D[{Cos[t], Sin[t], t/2}, {t, 0, 4 Pi}]

Surface (sphere):

ParametricPlot3D[{Cos[u] Sin[v], Sin[u] Sin[v], Cos[v]}, {u, 0, 2 Pi}, {v, 0, Pi}]

Please visit the official Wolfram Language Reference for more details.