The difference between protoplasm and cytoplasm is very minor. Protoplasm is the content of the cell including the cell membrane, cytoplasm and the cell nucleus whereas cytoplasm is the jelly like substance surrounding the nucleus within the cell membrane. read more
The major difference between cytoplasm and plasma membranes are in betn outer cell wall and cytoplasmic surface called plasmamebran, which is arrenged by PLB membrane, and that coming after cell wall, and the cytoplasm means in betn plasmamebran and nuclear membrane the remaining part called cytoplasm which is other wise called protoplasm field with sub cellularorganels. read more