Life Science Final Practice Exam

Which body region is the tail-like posterior segment in many arthropods?

Head Abdomen Thorax Carapace

Correct Answer:

Abdomen

Explanation:

Arthropods have their bodies organized into distinct regions, with a rear portion that often appears tail-like called the abdomen. This abdomen is the posterior tagma that contains much of the digestive and reproductive systems and can be long and segmented, giving that tail-like look in many species. The front region is the head, which houses sensory and feeding organs; the middle region is the thorax, which typically bears legs (and wings in many insects); the carapace is a protective shield on the front body in some crustaceans, not a posterior region. Therefore, the tail-like posterior segment corresponds to the abdomen.

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