The Protoplast is the Plasmalemma and everything inside of it.
The Apoplast is composed of Everything Outside of the Plasmalemma. This includes all Cell Walls & Intercellular Spaces
Protoplasts are interconnected via Plasmodesmata that traverse adjacent Cell Walls.
The Symplast includes the interconnected Protoplasts within a Tissue or Organ.
An understanding of the Apoplast and Symplast is of fundamental importance!
This cell has an intact Wall. You can see the Cellulose Fibrils that form the wall. These are like the yarn in a sweater. | The Cell Wall has been partly removed to reveal the Plasmalemma which lies beneath it. |