Chapter 6 / 5 short lessons
Respiration in humans
Connect airways and gas exchange to energy release, then explain smoke effects and recovery after exercise.
G3 Combined Biology / K327 / K328 / 2027 syllabus
What do you think?
A runner stops, but keeps breathing quickly. What still needs explaining?
Lessons
0 of 5 marked as readFollow air into the lungs
Identify airway structures, alveoli and associated capillaries and state their functions.
About 4 minExchange gases at an alveolus
Link alveolar structure and blood supply to efficient diffusion.
About 5 minLink smoke components to effects
Explain the major biological effects of the three named tobacco-smoke components.
About 4 minAerobic respiration releases energy
Define aerobic respiration in human cells and state its word equation.
About 5 minAnaerobic respiration and recovery
Explain anaerobic energy release, lactic acid and repayment of an oxygen debt.
About 5 minWhat you will be able to do
- Trace airways and explain alveolar exchange.
- Distinguish the effects of nicotine, tar and carbon monoxide.
- Compare respiration pathways and explain recovery breathing.