why don't animal cells need Cell wall and/or vacuole?!

plants have cell wall because they are smooth and soft while animals can protect themself due to their skin by using their behavioural, physical actions like to protect themselves from extreme sun shine they move to a shedy place while plant can't move from their place, so therefore they have cell wall. animals don't have vacuoles because instead of this they have systems to store food or release water and store water as animals are complex than plants, so therefore they does not need any vacuole.

I little bit agree with Mehreen ...also plants have large amount of dead cells for support... in lack of cell wall ..dead cell would disappear and could not be used as support...

But the main difference is in the body motion... plants need to be rigid...which they could not without cell walls.. And animals evolved to have tissues to show motion...if we had rigid cell walls ..we could not move our arms or legs...and if we could..our arms would break down and detach..the way branches of trees does when we force to bend them...