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Animal Cells have:

• Cell membrane - controls movement of materials.
• Cytoplasm - where many chemical reactions happen.
• Nucleus - controls the activities of the cell.
• Ribosomes - proteins are synthesised (made) here.
• Mitochondria - energy is released during aerobic       respiration.

Plant Cells have all 5 things that animal cells have.

They also have:

• Cell Wall - give the cell support & shape.
• Chloroplasts - contain chlorophyll for photosynthesis.
• Permanent Vacuole - contains cell sap.

Materials that can move across the cell membrane are Carbon Dioxide, Oxygen & Glucose.

Some examples of specialised cells are:

• In animals - sperm cells & nerve cells. 
• In plants - root hair cells & xylem.

Differentiation happens as organisms develop and some cells become specialised to carry out certain jobs.