IGCSE Biology

Explain the role of goblet cells, mucus and ciliated cells in protecting the breathing system from pathogens and particles

Explain the link between physical activity and the rate and depth of breathing in terms of: an increased carbon dioxide concentration in the blood, which is detected by the brain, leading to an increased rate and greater depth of breathing

Explain the differences in composition between inspired and expired air

Explain the role of the ribs, the internal and external intercostal muscles and the diaphragm in producing volume and pressure changes in the thorax leading to the ventilation of the lungs

State the function of cartilage in the trachea

Identify in diagrams and images the internal and external intercostal muscles

Investigate and describe the effects of physical activity on the rate and depth of breathingInvestigate and describe the effects of physical activity on the rate and depth of breathing%MCEPASTEBIN%

Describe the differences in composition between inspired and expired air, limited to: oxygen, carbon dioxide and water vapour

Investigate the differences in composition between inspired and expired air using limewater as a test for carbon dioxide

Identify in diagrams and images the following parts of the breathing system: lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli and associated capillaries