International A Level Biology / Cell structure

From cells to organ systems

Edexcel International A Level Biology (YBI11), chapter 7: Cell structure, specification point 3.1, 3.2. Part of the full course.

Read the revision notes · International A Level Biology past papers

Cells are organised into tissues, organs and organ systems in multicellular organisms. Knowing what each level is made from helps you explain how structures such as the lungs and leaf work.

More lessons in Cell structure

• Light and electron microscopes: magnification and resolution
• Magnification calculations and units
• Core practical 5: the graticule and drawing animal cells
• The ultrastructure of an animal cell
• What each organelle does
• Recognising organelles in electron micrographs
• Protein transport: rough ER to Golgi to the outside
• Prokaryotic cells