Digestion

Question 1

What is digestion

Answer 1

The food must be broken down before it can be abosrbed and used for its purpose in the body.

Question 2

4 steps

Digestion

Answer 2

1. ingestion
   * Taking in the food physcially in the mouth
2. Digestion
   The break down of food into to small moleucules
3. Absorption
   Transfer of the nutrients into the bloodstream
4. Ejection
   The waster materials are removed from the body.

Question 3

2 types of digestion

Chemical

Answer 3

• This is the enyzmes work to break down food in the mouth and stomach

Question 3

The process of digestion

The process of digestion

Answer 3

1. The food is broken down in the mouth into smaller pieces by the teeth
   - Canines and incisors: cut and grab the food
   - Molars: Grind and crush the food
2. Food is mixed in with the saliva which contains
   - Enzymes (help speed up the rate of reactions in living things
   - Water: Dissolve food particles to make it easier to taste
   - Mucus: which helps with swallowing and acts as a lubricant.
3. The tongue pushes the food back where it is swallowed
4. Food is prevented from entering the trachea by a flap called epiglottis
5. The swallowed food moves down into the stomach by a long tube which is called the esophagus.
6. When the food is going down the esophagus it activates muscular contractions called peristalsis. Which helps the food go down the esophagus.

Question 3

Mechanical

Answer 3

Physically breaking down the food form the teeth and the churining of the stomach and breaking down of fats - enymes can fucntion more easily when broken down into fats.

Question 3

What is a bolus

Answer 3

Moist ball of food created when mixing with saliva