Cells and movement across membranes – WJECCells

All living things are made of cells which are differentiated to perform different functions. Substances move into or out of the cell and enzymes are catalysts contributing to cell metabolism.

Part ofBiology (Single Science)Cells, organ systems and ecosystems

Cells

Animals and plants are organisms – they consist of many that work together.

Animal cell structure

The main parts of an animal cell are the nucleus, cell membrane, cytoplasm and mitochondria.

Diagram of an animal cell with labels for Cytoplasm, nucleus, cell membrane, and mitochondrion.

Plant cell structure

Plant cells contain the same features as animal cells. They also have some additional ones:

  • chloroplasts
  • cell wall made of cellulose
  • large central vacuole
Diagram of an plant cell with labels for cell membrane, nucleus, cytoplasm and found in plants only; chloroplast, vacuole, cell wall.

Summary of features found in cells and their functions.

PartFunctionFound in
Cell membraneControls the movement of substances into and out of the cellPlant and animal cells
CytoplasmJelly-like substance, where chemical reactions happenPlant and animal cells
NucleusCarries genetic information and controls what happens inside the cellPlant and animal cells
MitochondriaWhere respiration takes place, releasing energy for the cellPlant and animal cells
Large central vacuoleContains a liquid called cell sap, which keeps the cell firmPlant cells only
Cell wallMade of a tough substance called cellulose, which supports the cellPlant cells only
ChloroplastsContain the green pigment chlorophyll, which absorbs light energy. This is where photosynthesis occurs.Plant cells only
PartCell membrane
FunctionControls the movement of substances into and out of the cell
Found inPlant and animal cells
PartCytoplasm
FunctionJelly-like substance, where chemical reactions happen
Found inPlant and animal cells
PartNucleus
FunctionCarries genetic information and controls what happens inside the cell
Found inPlant and animal cells
PartMitochondria
FunctionWhere respiration takes place, releasing energy for the cell
Found inPlant and animal cells
PartLarge central vacuole
FunctionContains a liquid called cell sap, which keeps the cell firm
Found inPlant cells only
PartCell wall
FunctionMade of a tough substance called cellulose, which supports the cell
Found inPlant cells only
PartChloroplasts
FunctionContain the green pigment chlorophyll, which absorbs light energy. This is where photosynthesis occurs.
Found inPlant cells only