Cell organisation

• What are the basic building blocks of all living organisms?

  Cells
• What is the primary distinction between unicellular and multicellular organisms?

  Cell number in their composition
• What does it mean for cells to be 'specialised' in complex multicellular organisms?

  Carry out particular functions
• What do specialised cells form in multicellular organisms?

  Tissues
• What do tissues form in organ systems?

  Organs
• Which human system provides the body with nutrients?

  Digestive system
• What human system removes carbon dioxide from the body?

  Respiratory system
• Which human system provides the body with oxygen?

  Respiratory system
• What is the role of the circulatory system?

  Move materials around the body
• Xylem is strengthened by what substance?

  Lignin