Modeling Human

Make detail on eye area. Add two edge loops on eye area. And make little shape there.

Select edge border on eye area. Extrude edge inside eye socket.

Make detail on node area. Add edges using split polygon and delete edge (red cross).

Add edges for detailing nose. And we have done on nose area.

Make detail on mouth area. Add edges and make little shape there.

Add loop edges on mouth area. And shape the vertex following curve.

Add two loops on mouth area. And shape it.

Select edges border on mouth area. Extrude it inside.