Things can enter the cell through various processes, such as osmosis, diffusion and active transport. Passive transport (diffusion/osmosis) occurs because of a difference in concentration across the membrane.
Mitochondria
Cytoplasm holds all the organelles in place.
The cell membrane. It also allows certain things to enter and exit.
The cell membrane is the outermost part of the cell. It's function is to protect as well as allows certain things to enter and exit the cell.
Cell membranes only allow certain things to enter the cell. So basically they filter good stuff to come in the cell and don't allow bad stuff to enter. Permeable = allowed to enter Semi-permeable = somethings can enter; some can't Impermeable = nothing can enter
A cell is like a castle because there are only certain areas things can enter or leave. There are also many small things that make the whole castle run smoothly, just like there are in a cell.
Cell membranes only allow certain things to enter the cell. So basically they filter good stuff to come in the cell and don't allow bad stuff to enter. Permeable = allowed to enter Semi-permeable = somethings can enter; some can't Impermeable = nothing can enter
A filter or a gatekeeper can be a structure that allows only certain things to pass through. These structures help control and regulate what is permitted to enter or proceed.
Cell membrane
The cell membrane allows only certain things to pass in and out of the cell.
the process that causes the water to enter and leave the cell is diffusion
shape and transport room for things to enter and leave the cell