TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: Acting like drawstrings to close off the alimentary canal, what regulates the passage of material between compartments? Answer: sphincter

SOLUTION: Acting like drawstrings to close off the alimentary canal, the sphincter regulates the passage of material between compartments.

PROBLEM: Question: Which two systems primarily function to rid the human body of the wastes resulting from cellular energy production? Answer: respiratory and circulatory systems

SOLUTION: Respiratory and circulatory systems two systems primarily function to rid the human body of the wastes resulting from cellular energy production.

PROBLEM: Question: A colloid is a homogeneous mixture with medium-sized what? Answer: particles

SOLUTION:
A colloid is a homogeneous mixture with medium-sized particles.