Digestion can be either chemical or physical depending on a number of factors. Both kinds of intestinal functions are important to increase the rate of digestion and to provide a proper nutrient intake. Usually it is extremely difficult to extract nutritional value directly from them. Therefore, it is necessary to break the meals down first using actual procedures and then hydrolyse the nutrients with enzymes to small molecules using chemical reactants.
Physical Digestion Physical intestinal function or physical digestion is the splitting down of food into small contaminants by actual procedures such as smashing and chewing. It is mainly done by using the stomach contractions, teeth, mouth and bile. The process of taking the food from mouth to the body is called ingestion. The teeth initiates the mechanical digestion by grinding the food and this process is also called as masticating.
When initiating the chemical digestion process, the saliva secreted helps in softening the food into semi-solid lump. Salivary amylase enzyme helps in digesting the carbohydrates and mucus. This way the food particles are made finer for swallowing and chemical breakdown in the digestive track.
The food thus made into semi solid lump is then pushed through the throat and esophagus, a hollow tube that connects throat and stomach. On reaching the stomach the food goes through a series of chemical and mechanical treatment. Inside the stomach mechanical digestion called peristaltic contractions helps to churn the food bolus. The chemical process mixes the bolus with digestive juices released by the stomach lining cells. The food particles go through hours of digestive process passing through various stages of chemical digestion.
The processed food is moved into rectum by small intestine. Then the food gets fermented inside large intestine by the gut bacteria. This aids in digesting the unfinished projects of small intestine. There are four important hormones that help in regulating the digestion process. Even though the mechanical and chemical digestion processes are very important for the human digestive process, chemical digestion is considered more important.
This is due to the complex procedure involved in Chemical digestion. Mechanical Digestion: Mechanical digestion refers to the break down of food into digestible particles, mainly by the teeth. Chemical Digestion: Chemical digestion refers to the process by which compounds with a high molecular weight in the food are broken down into small substances that can be absorbed by the body. Mechanical Digestion: Mechanical digestion occurs from the mouth to the stomach.
Chemical Digestion: Chemical digestion occurs from the mouth to the intestine. Mechanical Digestion: A major part of mechanical digestion occurs in the mouth. Chemical Digestion: A major part of chemical digestion occurs in the stomach.
Mechanical Digestion: Mechanical digestion is driven by teeth. Chemical Digestion: Chemical digestion is driven by enzymes. Mechanical Digestion: The mechanical breakdown of large food particles into small food particles occur in the mechanical digestion.
Chemical Digestion: The chemical breakdown of compounds with high molecular weights into low molecular weight compounds occurs in the chemical digestion. Mechanical Digestion: Mechanical digestion increases the surface area for the enzymatic reactions in the chemical digestion. Chemical Digestion: Chemical digestion enhances the absorption of the nutrients by breaking down them into small molecules. Mechanical and chemical digestion are two digestive mechanisms that facilitate the absorption and excretion of food ingested by animals.
Mechanical digestion is the mechanical breakdown of food into small particles. It occurs from mouth to stomach. Chemical digestion is the chemical breakdown of food into small chemical substances. It occurs from mouth to the intestine. Mechanical digestion facilitates the chemical digestion while chemical digestion facilitates the absorption of nutrients.
This is the difference between mechanical and chemical digestion. Chandler, Stephanie. Available here , Jun 19,
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