5: Vacuole. They help to retain waste products of the cell on animal cells and to regulate the hydric balance in plant cells.
6: Cell membrane. It is a phospholipidic bilayer that separates the cell interior from the outside, it protects the cell and regulates the exchange of molecules.
7: Mitochondria. It's the powerhouse of the cell, here's where the cell respiration happens to obtain energy for the cell.
8: Ribosomes. They're composed of RNAr, and fulfill the function of translation of the RNAm to proteins.