Question:
Number of segments present in an insect head are:
Number of segments present in an insect head are:
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Remember segment counts for insect body regions:
- Head = 6 fused segments.
- Thorax = 3 segments (prothorax, mesothorax, metathorax).
- Abdomen = 11 to 12 segments (primitive/embryonic state).
- Head = 6 fused segments.
- Thorax = 3 segments (prothorax, mesothorax, metathorax).
- Abdomen = 11 to 12 segments (primitive/embryonic state).
Updated On: Aug 18, 2026
- 9
- 6
- 1
- 12
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
The insect head is a highly specialized, sclerotized sensory and feeding capsule.
Morphological and embryological evidence shows that the head evolved through the fusion of several anterior body segments of an ancestral arthropod.
Step 2: Detailed Explanation:
Embryologists agree that the insect head is composed of 6 embryonic segments that have fused indistinguishably:
1. Pre-antennal/Labral segment (procephalon).
2. Antennal segment.
3. Intercalary/Premandibular segment.
4. Mandibular segment (gnathocephalon).
5. Maxillary segment.
6. Labial segment.
Step 3: Final Answer:
The insect head is composed of 6 fused segments, which is option (B).
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