6.4 Gas exchange

IB Assessment Statements

• 6.4.1. Distinguish between ventilation, gas exchange and cell respiration (2)
• 6.4.2 Explain the need for a ventilation system (3)
• 6.4.3 Describe the features of alveoli that adapt them to gas exchange (2)
• 6.4.4 Draw and label a diagram of the ventilation system, including trachea, lungs, bronchi, bronchioles and alveoli (1)
• 6.4.5 Explain the mechanism of ventilation of the lungs in terms of volume and pressure changes caused bu the internal and external intercoastal muscles, the diaphragm and abdominal muscles (3)

—- 0O0 —-

PPTs: 1 / 2

Articles:

Websites:

• The Respiratory System – from Maricopa
• Click4Biology

Videos/Simulations:

• Gas Exchange Animation from McGraw Hill
• Circulatory and Respiratory System Crash Course