Animal and plant cells have some of the same parts. A clear, jelly-like material that fills plant and animal cells is cytoplasm. Both types of cell also have a thin outer covering called the cell membrane. Only plants cells have a stiff cell wall. Both have a main control center that is the nucleus. A plant cell is usually larger than an animal cell. Plants cells often have a(n) box-like shape. Plant cells have green chloroplasts that make food.