Arthropods (Grasshopper)

Perch Dissection Pre-AP Biology April 9, 2014 - Vu 3rd

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Melanoplus differentialis

The Grasshopper, or Melanoplus differentialis (common grasshopper), is classified in the phylum Anthropoda. Grasshoppers, like all insects, have a three part body of a head, thorax, and abdomen. They also have compound eyes like other insects. However, their legs and wings set them apart from others because of the jumping legs as well as walking legs that they use and the layer of wings they use to fly. Their segmented bodies are made up of a hard exoskeleton of tagmata.

Objectives

In this presentation about grasshoppers, you will learn about their external and internal anatomy as well as their organs and functions. You will also learn about the grasshoppers complex respiratory system and how it works.

Evolutionary Relationships of a Grasshopper

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Grasshopper Dissection - tutorial

Grasshopper Anatomy Part 1

Respiratory System

The exchange of gases in a grasshopper happen through the tracheal system but begins at the spiracles where air is taken in first. This system contains of ten spiracles located in the abdominal area and the others are thoracic. Oxygen diffuses into cells directly into the atmosphere and that completes the grasshoppers process of respiration. The air sacs that the tracheal system works to create can be compared to human alveoli because it stores carbon dioxide and oxygen when the respiration is taking place. However, we take air in from our mouths and nose while their spiracles do that with the control of their brains. A few of the spiracles are involved in the expiration of air as well. The human tracheae performs the role of cleaning air while the grasshoppers tracheal system works as an independent function not involving the circulatory system.