If you contorted your face in disgust over a foul smell in what ways would your face change

When someone contorted their face in disgust over a foul smell, frowns, widens their nose, stretches their mouth a little, seems to shrink the face, and close his eyes a little, for a few seconds the face changes completely obtaining an appearance of someone older.

The (circulatory, digestive, excretory) works to break down food eaten before exercising. The (circulatory, digestive, excretory) takes in the nutrients obtained from the food. The body sweats as a mechanism to cool off, because the (circulatory, digestive, excretory) is working to flush out toxins.

Explanation: