Analyzing Arthropods

Robert Corpening - PAP Bio- Ms Vu- P. 2

Objectives

Readers will learn about the background of arthropods, as well as the similarities between the groups of arthropods. Readers will also analyze the respiratory systems of grasshoppers and crawdads.

Exoskeleton Experience

Arthropods, belonging to the phylum Arthropoda, can live in most environments, such as oceans, freshwater farms, and terrestrial environments such as fields. The predators of arthropods are diverse, but in the case of crayfish, birds and large fish prey upon them, and they are omnivores, consuming both insect larvae and plant matter. Grasshoppers prey upon grains and other plant matters, and are eaten by many mammals and small birds. Most Arthropods are secondary consumers in their ecological environment. Arthropods such as grasshoppers and crayfish have a true coelom and, another important development, they have an exoskeleton.

Recognizing the Respiratory System

Crawfish and grasshoppers each have very similar respiratory systems, but one of the key differences is that crawfish have gills, large feathery substances containing blood vessels to expose blood to oxygen, whereas grasshoppers use spiracles, holes opening into the body, to gain oxygen. Once inside, grasshoppers have tracheal tubes which direct air into the bloodstream.

Interesting Information