The diagram shows part of the human breathing system. (i) Name the parts labelled A, B, C and D. (ii) In which labelled part does gas exchange take place? (iii) What is the function of part A? (iv) B and C have rings of cartilage. Suggest a function of these rings. (v) Suggest a reason why smoking cigarettes is bad for your lungs.

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The diagram shows part of the human breathing system - Leaving Cert Biology - Question c - 2015

Question c

The diagram shows part of the human breathing system. (i) Name the parts labelled A, B, C and D. (ii) In which labelled part does gas exchange take place? (iii) W... show full transcript

Worked Solution & Example Answer:The diagram shows part of the human breathing system - Leaving Cert Biology - Question c - 2015

Step 1

Name the parts labelled A, B, C and D.

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Answer

A = Larynx (or voice box), B = Trachea (or windpipe), C = Bronchus, D = Alveolus (or air sacs).

Step 2

In which labelled part does gas exchange take place?

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Answer

Gas exchange takes place in part D (or alveolus).

Step 3

What is the function of part A?

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Answer

The function of part A (larynx) is to make sound.

Step 4

B and C have rings of cartilage. Suggest a function of these rings.

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Answer

The rings of cartilage serve to keep the trachea and bronchi open, maintaining an open airway.

Step 5

Suggest a reason why smoking cigarettes is bad for your lungs.

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Answer

Smoking can cause serious health conditions such as cancer, emphysema, or chronic obstructive pulmonary disease (COPD).

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The diagram shows part of the human breathing system - Leaving Cert Biology - Question c - 2015

Worked Solution & Example Answer:The diagram shows part of the human breathing system - Leaving Cert Biology - Question c - 2015

Name the parts labelled A, B, C and D.

In which labelled part does gas exchange take place?

What is the function of part A?

B and C have rings of cartilage. Suggest a function of these rings.

Suggest a reason why smoking cigarettes is bad for your lungs.

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