Which statement correctly lists the three primary body segments of an insect in order from front to back?

Which statement correctly lists the three primary body segments of an insect in order from front to back?

• A. Thorax, head, abdomen
• B. Abdomen, head, thorax
• C. Head, thorax, abdomen
• D. Head, abdomen, thorax

Answer: (C)

Insects have three main body segments arranged from front to back: head, thorax, and abdomen. The head sits at the front and carries the sensory equipment and mouthparts used for feeding and sensing the environment. The thorax is the middle section that bears the legs (and, in many species, the wings). The abdomen is the posterior segment housing the digestive and reproductive organs and often more specialized systems like spiracles for breathing. So the sequence from front to back is head, then thorax, then abdomen. Placing the thorax or abdomen ahead of the head would not reflect the actual body plan.

Insects have three main body segments arranged from front to back: head, thorax, and abdomen. The head sits at the front and carries the sensory equipment and mouthparts used for feeding and sensing the environment. The thorax is the middle section that bears the legs (and, in many species, the wings). The abdomen is the posterior segment housing the digestive and reproductive organs and often more specialized systems like spiracles for breathing. So the sequence from front to back is head, then thorax, then abdomen. Placing the thorax or abdomen ahead of the head would not reflect the actual body plan.