The insect body is divided into segments (hence Insect … In-sections) and are each controlled by their own ganglia– which are mini-brains which altogether form the nervous system.
The head is divided into 6 segments (labral, antennal, intercalary, mandibular, maxillary and labial), the thorax into 3 (prothorax, mesothorax and metathorax) and the abdomen into 11 segments. This general body plan of an insect can differ between orders but most insects loosely resemble the diagrams below.
This is a typical insect leg. These segments can be modified depending on the need of the insect’s locomotion.
This shows the typical venation on an insects. The various veins, cross veins and sizes of cells between them can be used to identify a wide variety of insects.