Comparing the Organ Systems of Worms, Grasshoppers. Frogs, and Humans

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Comparing the Organ Systems of Worms, Grasshoppers. Frogs, and Humans

Shannon Wong

A glance at the external appearance of a human being, a frog, a grasshopper and a worm usually won't stir up any immediate curiosity within the average person. For those who are interested, most would find it hard to believe that these living organisms can be compared to one another. However, if one were to explore the organ systems of these unique, individual multi-cellular organisms, one would find examples of interesting similarities as well as differences between these four organisms.

Frogs and humans have the same respiratory system, as they both use two lungs as a method of bringing air into their body. They both breathe through their nostrils (frogs also have internal nares in addition to the external ones) and mouths, which lead to their trachea. The trachea is designed to moisten air, and keep it clean. Branching out from the trachea are bronchi (small air passages in the lungs), which in turn branch out into thin branches called bronchioles. Fine, feathery membranes, called alveoli, are attached to the ends of the bronchioles. Gas exchange occurs with blood at the