ENTO 322 1st Edition Lecture 10 Outline of Last Lecture I. External Morphology part 1Outline of Current LectureI. External Morphology part 2Current LectureI. Insect morphologyA. Body region (metamerization)i. Headii. Thoraxiii. AbdomenB. Exoskeleton C. Structure of the headi. Antennae types ii. Mouthparts iii. Eyes1. Compound eyes – differentiate color, shapes, and sizes2. Simple eyes (ocelli) – tell the difference between light and dark; simple metamorphosis3. Stemmata – complete metamorphosis D. Structures of the thoraxi. Legs1. Saltatorial legs – jumping2. Cursorial legs - runningii. Wings1. Vestigial wings – non functioningiii. Spiracles – allow for oxygen to make its way into the body of the insectE. Structures of the abdomen i. Spiracles – allow for oxygen to make its way into the body of the insectii. Valves – a part of the reproductive system; very flexible; used in separating out species; “lock and key” it must fit perfectly in order to reproduceiii. Ovipositor – females use this to deposit eggs in a safe place These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.iv. Penis (Aedeagus) – some insects have two in order to increase the success of reproduction; the other part to the “lock and key” must fit perfectly with the female valve in order to accomplish mating v. Styles – equivalent to antennae; it can sense vibration and temperature vi. Cerci – long sensory structures; can be used in mating to hold the female; also have sensory cells associated with them F. External sensory structures i. Hairs – each hair is hooked into the nervous system; if that hair moves at all they can sense itii. Pegs – mainly located on the antennae as a means to sense pheromones; it creates an impulse that goes to the nervous system; used to find food and matesiii. Stretch receptors – nerve tissues associated with stretch receptors; when something touches its leg they will immediately