1Y: The Digestive System Flashcards
What is a cell?
A cell is the smallest working unit of a living organism.
What is Unicellular?
One cell - eg bacteria, mushrooms.
What is Multicellular?
Organisms with many cells - eg humans, sheep, cows.
What is Egestion?
Getting rid of undisgested food from the body.
What is Tissue?
Group of cells working together to carry out a similar function.
What is an Organ?
Group of tissues working together to carry out a similar function - eg Animal - heart, lungs; Plant - stem, root.
What is a System?
Group of organs working together to carry out a similar function e.g. Animal - disgestive system; Plant - root system.
What is Digestion?
Digestion is the break down of large food particles to smaller particles.
Why do we need food? (3)
We need food for:
- Energy
- Growth
- Repair
Label the Digestive System?
Attached.
What is the function of the Mouth (with teeth)? (3)
- Take in food.
- Crush food with the teeth.
- Amylase is added to the food.
What is the function of the Oesophagus?
- Carry/takes food down to the stomach.
What is the function of the Stomach? (2)
- Churn the food.
- Add acid to break down the food.
What is the function of the Small Intestine? (2)
- Further digestion by enzymes.
- Absorption of digested food into the blood.
What is the function of the Large Intestine/Colon? (2)
- Water is absorbed into the blood.
- The waste left is prepared for egestion.
What is the function of the Salivary glands?
Make saliva, which contains an enzyme, amylase, to break starch down to smaller sugars.
What is the function of the Liver? (2)
- Produces liquid bile, which helps digest fat.
- Regulates the amount of each food in the blood.
What is the function of the Gall Bladder?
- Stores bile from the liver until it is needed.
What is the function of the Pancreas?
- Makes enzymes to break down food.
What is Amylase?
- Amylase is an enzyme that breaks starch down to a sugar, maltose.
What is an enzyme?
- An enzyme is a chemical, found in living organisms, that speeds up chemical reactions.
What is Peristalsis?
- Peristalsis is a muscular movement that only occurs in the muscles of the digestive system. It is used to push the food along the system.
What are the four types of teeth?
- Incisors
- Canines
- Premolars
- Molars
What is the function of the Incisors?
- Cut and slice food.
What is the function of the Canines?
- Grip and tear food.
What is the function of the Premolars?
- Chew and grind food.
What is the function of the Molars?
- Chew and grind food.