When the cracker is in your mouth, your saliva starts to break the bonds holding the cracker together as well as mix with it. This makes the cracker softer and easier to swallow. The act of chewing is the mechanical digestion as chewing helps to break the cracker into smaller pieces so that it's easier to swallow.
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Answer:
When the cracker is in your mouth, your saliva starts to break the bonds holding the cracker together as well as mix with it. This makes the cracker softer and easier to swallow. The act of chewing is the mechanical digestion as chewing helps to break the cracker into smaller pieces so that it's easier to swallow.