Plasmodesmata.
osmosis
The passage of water through the cell membrane is called osmosis. Osmosis involves the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration across a selectively permeable membrane, such as the cell membrane.
Cell membrane and sap vacuole membrane
Because it is a small molecule, water can diffuse through the cell membrane.
"diffusion"
The cell membrane, or plasma membrane, regulates the passage of materials into and out of cells through selective permeability. This means that only certain substances are allowed to pass through the membrane, while others are blocked or actively transported. This selective permeability helps maintain the internal environment of the cell and allows for proper function and communication with the external environment.
In a plant cell a vacuole stores water. The membrane allows the passage of water into and out of the cell. The vacuole gets smaller if there is not enough water in the environment because its water is being used in the cell to keep the cell functioning normally.
The structure you are referring to is the cell membrane, also known as the plasma membrane. It surrounds the cell, acts as a barrier, and regulates the passage of substances in and out of the cell through selective permeability.
diffiusion
diffusion
The cell membrane, which is a structure surrounding the cell, controls the passage of nutrients, water, and oxygen in and out of the cell. It acts as a selective barrier, allowing specific molecules to pass through via processes like diffusion or active transport.
The movement of water and dissolved materials through a cell membrane is called Osmosis.