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CAIE IGCSE Biology 7.3.4 Structure of Human Teeth Questions

Practise labelling tooth sections and explaining how bacteria, sugar and acid damage enamel and dentine during tooth decay.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • label enamel, dentine, pulp, nerves, blood vessels or gum in tooth sections
  • explain tooth decay by linking sugar residues, bacterial respiration and acid erosion
  • distinguish enamel and dentine as tooth layers damaged when acid dissolves hard tissue

CAIE IGCSE Biology 7.3.4 Structure of Human Teeth Questions question 1

[Maximum number: 8]

Question (a)

(a)

Fig. 2.1 is a vertical section of a human molar tooth and surrounding structures.

Fig. 2.1

Fig. 2.1

State the names of the parts labelled A to D on Fig. 2.1.

A

B
C

D

[ 4 ]

Question (b)

(b)

Fig. 2.2 is an X-ray of decay in a molar tooth.

Fig. 2.2

Fig. 2.2

Explain how tooth decay occurs.

[ 4 ]
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