A-LevelBiologyGas exchange9700/12 · May/June 2012 · Q331 Mark
What would be seen in a photomicrograph of the wall of the trachea?
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Aelastic fibres: present, epidermis: present, smooth muscle: present
Belastic fibres: present, epidermis: absent, smooth muscle: present
Celastic fibres: present, epidermis: absent, smooth muscle: absent
Delastic fibres: absent, epidermis: present, smooth muscle: absent
✓ Correct answer
C: elastic fibres: present, epidermis: absent, smooth muscle: absent
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