Digestion Flashcards
Salivary glands
Produces saliva: enzyme to break down starch, lubricates food
Function of the digestive system
To break down food and absorb the nutrients produced into the bloodstream.
Oesophagus
Connects mouth and stomach
Stomach
Digests protein and stops bacteria getting any further
Muscular tissue to mix
Glandular tissue to secret enzymes and acid
Epithelial tissue covers the stomach
Small intestine
Digestion completed and products absorbed. Soluble food absorbed.
Pancreas
Secrets enzymes
Liver
Makes bile
Large intestine
Water absorbed, leaving faeces
Villi adaptations
Finger like projections = large surface area
Thin + many capillaries closets the wall = easier for diffusion
Where are villi
In the small intestine
What makes up the digestive system and what does it do
Glands (pancreas & salivary glands) produce digestive juices
Stomach & small intestine digestion occurs due to enzymes in juices
Liver produces bile to aid lipid digestion
Small intestine absorption of soluble food through villi
Large intestine where water is absorbed leaving I digested food = faeces
What is digestion
The break down of insoluble molecules into soluble ones that can be absorbed
Amylase released
Salivary, pancreas and small intestine
Amylase do and where
Starch into sugars
Mouth and small intestine
Protease produced where
Stomach
Pancreas
Small intestine
Protease breaks down what where
Proteins into amino acids in the stomach and small intestine
Lipease is produced where
Pancreas
Small intestine
Lipase breaks down what where
Lipids into glycerol and fatty acids
Small intestine
What does bile do
Neutralises stomach acid
Makes conditions for the small intestine slightly alkali
Emulsifies fats
Why must fats be emulsified
To increase the SA of the fats for lipease enzymes to act upon
What is pepsin
A protease from the stomach
Where is bile produced
Liver
Where is bile stored
Gall bladder
