Smoking has particularly strong effects in the digestive tract. It increases a person's risk of several digestive tract diseases, and it can cause deadly cancers of the digestive organs.
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What does the digestive system do?
The digestive system is crucial for breaking food down so that your body can absorb the nutrients from it. Your digestive tract is the set of organs in your body that processes food and eliminates waste products. From top to bottom, the digestive tract consists of your mouth, esophagus, stomach, small intestine, and colon (large intestine).It changes food from macromolecule form (fats, proteins, and carbohydrates) to micromolecule form (lipids, amino acids, and glucose) so that it can enter your circulatory system. First, food is broken down mechanically (by chewing) and chemically (by saliva) in the mouth. It mixes with powerful digestive acids in the stomach, and then is also mixed with secretions like bile (from the liver) and insulin (from the pancreas) when it enters the small intestine. Water and digested nutrients are absorbed into the bloodstream through the walls of the intestines, and unabsorbed material is released as waste through the anus.
Why is the digestive system important?
When we eat, the food we take in is not in the form that the body can use as nourishment. The digestive system breaks down food into smaller molecules of nutrients so that they can be absorbed into the body providing us with the nourishmenet and energy we need.
