Which one of the following insect organ systems has placed the greatest limitation on their body size?
A)nervous system
B)digestive system
C)respiratory system
D)reproductive system
E)excretory system

Question

Quizplus · Accepted Answer

The respiratory system is the limiting factor for insect size because oxygen and carbon dioxide transport is limited by simple diffusion through a system of tracheae, which are small tubes that penetrate the insect body. As the size of the insect increases, the distance between the tracheae and the internal organs becomes too great for simple diffusion to supply sufficient oxygen or remove carbon dioxide. This limits the maximum size of insects, preventing them from growing larger than a few inches.

Which One of the Following Insect Organ Systems Has Placed