Describe the functions of the chosen organ system.

Write a 750- to 1000-word paper discussing the anatomy and physiology of one of the eleven major organ systems described in Chapter 21 in four animals of different phyla. Chapter 17 describes the major animal phyla. Two chordates of different classes may be used.

Describe the functions of the chosen organ system.

Describe the phyla of the animals used in the comparison.

Compare and contrast the same organ system in the four animals. Describe the differences and similarities of the organs in the organs of those systems.

Describe how the system in each animal helps it survive optimally in its environment.

Any paper describing circulation and respiration in fishes, roundworms, arthropods, and mammals will not be acceptable and will not be graded.

APA formatting should be used.

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