Based on the clue 'a part of the body where the food goes flip it aro...', what is the answer?

Based on the clue 'a part of speech prep', what is the answer? What is referred to by 'a part of speech'? Based on the clue 'a part of the body cerebro', what is the answer? Based on the clue 'a part of the body corazon', what is the answer? Based on the clue 'a part of the mind just under the surface from whi...', what is the answer? Based on the clue 'a part of the psyche', what is the answer? Based on the clue 'a part of the whole or a state of harmony', what is the answer? Based on the clue 'a part of this marine mammal was prized by medieva...', what is the answer?