There are about 10 quintillion insects in the world divided into more than one million known species, and some scientists believe there may be more than 30 million species. As the largest living group on earth, insects can provide us with insight into adaptation, evolution, and survival. which shall give a general idea of insects and their structure. This book is fully updated with the latest and foundational research that has influenced understanding of the patterns and processes of insects and is a valuable addition to the collection of any researcher or student working with insects. Contents: 1. Introduction. 2. Orders of Insects. 3. Insect Reproduction. 4. Locomotion in Insects. 5. Insect Nutrition. 6. Respiration and Circulation in Insects. 7. Insect Societies. 7. Insect Senses. 8. Insect Vision. 9. Excretory Systems of Insects. 10. External and Internal Morphology. 11. Insect Dissections. 12. Insect Life Cycles. 13. Aquatic Insects which offered as a classroom text for an introductory course in the subject.