Insect physiology is the study of the biological functions and processes of insects. Insects have a unique body structure, typically divided into three main parts: the head, thorax, and abdomen. They possess an exoskeleton made of chitin, which provides protection and support. Insects breathe through a system of tubes called tracheae, allowing for efficient gas exchange. Insects have specialized organs for various functions, such as compound eyes for vision and antennae for sensing their environment. Their digestive system includes a foregut, midgut, and hindgut, enabling them to process a wide range of food sources. Additionally, insects have a nervous system that coordinates their movements and behaviors.