This is a ringing that sets in after excessive noise exposure, such as in a rock concert (being too near the speakers) or the explosion of a firecracker. This excessive noise can cause injury to the ear, causing the ringing. The tinnitus will usually clear up on its own, and will last anywhere from minutes to hours.
Mechanical digestion is the actual physical break down of food into smaller pieces. One example of this is mastication (chewing) which occurs in the mouth by the teeth, which act to cut and grind food into smaller pieces. This makes them easier to later digest as it increases the SA of the food molecules.
Report Abuse. Mechanical digestion takes place in your mouth, basically you chew them down; Chemical digestion takes place in your gut by using various enzymes to break them down into smaller molecules that can be absorbed.eport Abuse. Mechanical digestion takes place in your mouth, basically you chew them down; Chemical digestion takes place in your gut by using various enzymes to break them down into smaller molecules that can be absorbed.