Biology CLEP Prep Practice Exam

The circulatory tissue is responsible for transporting nutrients and oxygen throughout the body, and plays a role in maintaining the digestive system functioning properly. This makes it incorrect as a response to the question. On the other hand, all the other tissue types listed in the options, namely epithelial, nervous, and muscular, are present in the human digestive system and play important roles in the digestive process. Therefore, they are not the correct answer to the question.