Digestive System Flashcards
What is ingestion?
The process of taking food into the mouth
What is digestion?
Food is broken down into soluble molecules that can enter the blood stream
What is absorption?
The process where the digested food enters the blood stream
What is assimilation?
The process happening in all cells that use up the digested food molecules
What is egestion?
The removal of waist materials and indigestible parts of food that we eat
What are the 2 types of digestion called?
Mechanical digestion and chemical digestion
What is food broken down by?
Enzymes
What are the 3 main enzymes?
Amylase, protease and lipase
What happens in the mouth?
Food is mechanically digested by teeth and food is mixed with saliva which lubricates food for swallowing
What is the oesophagus?
The tube that food is pushed along from the mouth to the stomach
What is the process called that pushes food along the oesophagus from the mouth to the stomach?
Peristalsis
What is the stomach ?
A large muscular bag that is able to expand when large amounts of food enter it
How long does food stay in the stomach for?
About 4 hours
What is hydrochloric acid?
The acid found In your stomach that is responsible for killing bacteria in our food
What is the longest part of the digestive system?
The small intestine
What is the duodenum?
The upper part of the small intestine
What is an emulsion?
Tiny droplets of fat in water
Most of the food we eat is made up of what?
Large insoluble molecules
What is mechanical digestion?
Food is broken by the teeth and tongue in the mouth and churned in the stomach by muscular movements
What is chemical digestion?
Food is broken down by enzymes into very small and soluble pieces
What releases Hydrochloric acid?
Glands in the stomach wall
Where is bile made and stored?
It is made in the liver and stored in the gall bladder
What does the pancreas produce?
Pancreatic juice
Where is digestion completed?
The ileum
