instruction:
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
question:
What are phagocytes in tissues that only have contact with the dentric cells no internal environment called?
answer:
What are phagocytes in tissues that only have contact with the internal environment called?


question:
What is the chemical, no what is a mechanical barrier in insects that protects the insect?
answer:
What is a mechanical barrier in insects that protects the insect?


question:
What is another word for the Earth's lower, no i mean,  upper mantle are the different tectonic plates called?
answer:
What are the different tectonic plates called?