1 Arthropoda classes& characteristics  2 Why do we study insects or Insects effects on Health &Enviroment  3+4 Insect body regions &Head+mouthparts+anttenae  5 Thorax  6 Abomen  7 Internal systems  8 The ways in which arthropods may affect the health    9 Mosquitoes & Diseases  10 House fly & Diseases  11 cockroach +human flea+Bed Bug