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Multiple Choice
What is the main difference between the cephalothorax and the abdomen in anatomical terms?
A
The cephalothorax is part of the lower body, while the abdomen is part of the upper body.
B
The cephalothorax contains the digestive organs, while the abdomen contains the respiratory organs.
C
The cephalothorax is a fused head and thorax, while the abdomen is a separate body region.
D
The cephalothorax is found in mammals, while the abdomen is found in reptiles.
Verified step by step guidance
1
Begin by understanding the anatomical terms 'cephalothorax' and 'abdomen'. The cephalothorax is a body region found in certain arthropods, such as crustaceans and arachnids, where the head and thorax are fused together.
Recognize that the abdomen is a distinct body region that is separate from the cephalothorax. In arthropods, the abdomen typically follows the cephalothorax and contains various organs depending on the species.
Consider the anatomical differences: the cephalothorax includes structures such as the eyes, mouthparts, and appendages for locomotion, while the abdomen may contain digestive, reproductive, and other organ systems.
Note that the cephalothorax is not found in mammals or reptiles; it is specific to certain arthropods. In mammals and reptiles, the body is divided into head, thorax, and abdomen without fusion.
Conclude that the main difference is that the cephalothorax is a fused head and thorax region, whereas the abdomen is a separate body region, highlighting the structural and functional distinctions in arthropods.