- Gas exchange takes place in the human thorax. This is a collection of organs and tissues in the chest cavity
Remember to pay attention to command words in exams, as they will be asking different things. For example, a question asking you to “Describe” the structure of the alveoli is different from a question asking you to “Explain” the structure of the alveoli.
“Describe” questions are asking you to give an account of something or to write events or processes in a logical order.
“Explain” questions are asking you to write why something happens or to link its structure to its function – as a result of this, “because” will be an important part of your answer.