Contamination of food items by other living organism is known as food contamination. It<span> refers to foods that are spoiled or tainted because they either contain microorganisms, such as bacteria or parasites, or toxic substances that make them unfit for consumption.</span>
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Answer: In the mouth and pharynx, it consists of skeletal muscle that aids in swallowing.In the rest of the digestive tract, it consists of smooth muscle three layers in the stomach two layers in the small large intestines and associated nerve fibers.
