B04 Digestion Flashcards
Define mechanical/physical digestion
The cutting and crushing action of the teeth as feeding takes place as well as the rhythmical contractions of the guy and stomach
Define chemical digestion
The breaking down of food or food molecules by acids and enzymes within the digestive system
Define ingestion
The consumption of food/food molecules into the body
Why is it important for food to be chemically digested?
It converts the food into the nutrients which are needed for the body. It allows nutrients to be absorbed into the bloodstream.
What happens during the assimilation of digested food?
The digested food becomes the components for parts of the body, which can be stored or consumed by the metabolic system
Where does digestion occur
Mouth cavity. Stomach. Small intestine.
Where does the absorption of digested food molecules occur
Small intestine
Where does the absorption of water occur
The large intestine
Where does egestion occur
Large intestine. Anus.
What is the alimentary canal
A long coiled tube that is 7-9 meters long. At one end food is ingested and the undigested remains of a meal are egested through the anus. Digestion and absorption occur in between.
Use of salivary gland
Contains amylase that breaks down starch into maltose
Use of gall bladder
Produces bile to neutralize stomach acid
Use of pancreas
Contains lipase and carbohydrase to break down fats and carbohydrates
Define peristalsis
The action of the muscle moving food along the alimentary canal
Use of incisor
For cutting and snipping at food
