Master Exchange Surfaces fast ⚡ – clear explanations, supportive visuals, OCR-aligned.
You’ll cover
• Why single-celled organisms do not require specialised exchange surfaces.
• How surface area to volume ratio changes as organisms increase in size.
• Why larger organisms need specialised exchange surfaces to meet metabolic demands.
• The common features of efficient exchange surfaces, including large surface area and short diffusion distance.
• How ventilation and blood supply maintain steep concentration gradients.
• How alveoli, fish gills and root hair cells are adapted for efficient exchange.
What’s included
• Visual examples illustrating how surface area to volume ratio decreases with size.
• Worked tables calculating surface area to volume ratio for different shapes.
• Structured tables outlining key features of efficient exchange surfaces with examples.
• Comparison tables for alveoli, fish gills and root hair cells.
• Clear diagrams showing how structure supports function in each exchange surface.
• Concise spec reminders embedded alongside diagrams and tables to reinforce key OCR wording and expectations.
Format
Web-based textbook topic. Mobile/desktop friendly. Access with no time limit, updates included.
