Both, saliva breaks down food chemically, and your teeth mechanically break down food by cutting, grinding, and mashing.
Since there is no machinery in the body, it is a chemical breakdown.
Chemical digestion in the mouth primarily involves the breakdown of carbohydrates by the enzyme amylase in saliva. Not all foods require significant carbohydrate digestion, such as proteins and fats. Therefore, chemical digestion for these macronutrients begins further down the digestive tract, where specific enzymes like pepsin and lipase are present.
Mechanical breakdown helps chemical breakdown because when you chew, chemical breakdown is going on all at the same time. So, that is going to chemical because if you didn't have saliva (chemical breakdown) if would take real long to digest your food.
Breakdown of proteins produce aminoacids.
The organ in the digestive system where the chemical breakdown of food primarily occurs is the stomach. Here, gastric acids and enzymes break down food into smaller particles for further digestion and absorption in the intestines.
Mastication, commonly known as chewing, is the term for the mechanical breakdown of food in the mouth.
The breakdown of starch into sugars in the mouth.
The salivary glands in the mouth secrete enzymes in saliva that begin chemical digestion.
Peristalsis. The movement of muscles bringing the food to the stomach.
The act of grinding the food is not chemical change, as the same molacules are present in the same form, but there are many chemical reactions in the mouth (such as the breakdown of long chain carbohydrates), and other processes which aid digestion (mixture with mucus)
Digestion in the mouth and stomach both involve mechanical and chemical processes to break down food. In the mouth, chewing (mechanical) and saliva (chemical) begin the breakdown of food, while in the stomach, churning (mechanical) and gastric juices (chemical) further digest it. Both processes aim to transform food into a more digestible form, facilitating nutrient absorption later in the digestive tract. Additionally, enzymes play a crucial role in both locations, aiding in the breakdown of carbohydrates in the mouth and proteins in the stomach.
Mechanical breakdown makes food smaller so it wasn't be so large for the chemical breakdown.
Since there is no machinery in the body, it is a chemical breakdown.
The digestive system is responsible for the mechanical and chemical breakdown of food. It includes organs such as the mouth, stomach, and intestines, which work together to process food into nutrients that the body can absorb. Mechanical breakdown involves chewing and mixing, while chemical breakdown involves enzymes and acids that help decompose food into simpler molecules. This system ensures that the body receives the necessary nutrients for energy, growth, and repair.
They are everywhere. All cells have some amount of carbohydrates. In liver and muscles, carbohydrate glycogen is stored.
Saliva
the physical change in the change in food when the enters esophagus is when it has a chemical breakdown in your mouth with a mechanical breakdown the chemical breakdown is when your salivia is making the food moist the mechanical is when you chew the food so it easier for it to enter the esophagus and so the salivia can get it moist then your esophagus uses muscles to push the food down into your stomache