L6: Digestion and Organs

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

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- YOUR HW

-LessonUp

LESSON 6: Digestion & Organs

HW FOR TODAY:

- All worksheets that have to do with teeth

- WB PAGE 25

- expand your MINDMAP

Any questions?:

- do all worksheets that have to do with teeth

- WB PAGE 25

- expand your MINDMAP

Worksheet teeth exercise 1:

Worksheet teeth exercise  2:

a. the teeth are cearly different because the animals have different diets.

b. the carnivore's teeth are adaped to hunting. They can be used for gripping and ripping and because of this they chew very little.

c. the herbivore's teeth are adapted to grazing, they no longer have/need canines.They have incisors specialised for cutting graas and many molars for grinding dow difficut to digest plants. (Rigid Cell wall) 

Worksheet teeth and flouride left side:

nerves and blood vessels

Worksheet teeth and flouride right side:

• a) 4,5 teeth b) 3,5 teeth
• 2. this shows that the average number of decayed teeth per person goes down when the fluoride concentration in the water supply goes up.
• opinions ??

Worksheet teeth and flouride right side:

• a) 4,5 teeth b) 3,5 teeth
• 2. this shows that the average number of decayed teeth per person goes down when the fluoride concentration in the water supply goes up.
• opinions ??

Worksheet teeth and decay:

1. What is the function of the molars and premolars in our digestion?
   Grind the food into smaller pieces
2. What is plaque?
   Bacteria and food that gets stuck in your teeth
3. Why do you think large cavities are painful?
   Because they reach the pulp where the nerves are, these send signals of pain to the brain
4. Why do you think dentists tell us not to eat too many sugary foods?
   bacteria grow very quickly if the plaque contains a lot of sugary food
5. Explain why: a) most toothpastes contain fluoride? It protects the teeth from decay
    b) most toothpastes are weak alkalis? because acid attacks the enamel and produces a hole 
6. Find out what a ‘wisdom tooth’ is. Do all adults have wisdom teeth?
   No, some get the removed because the grow the wrong direction or there is not space left for them

Ingestion

Mechanical digestion

Chemical digestion

MOVING THE FOOD INTO YOUR MOUTH

BREAKING THE FOOD INTO SMALLER PIECES.

THIS IS DONE BY YOUR TEETH

BREAKING THE FOOD INTO EVEN SMALLER PIECES.

USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES. 

PHASES OF DIGESTION:

• INGESTION
• MECHANICAL DIGESTION
• CHEMICAL DIGESTION
• ABSORPTION
• EGESTION
• DEFAECATION

CHEMICAL DIGESTION:

• BREAKING THE FOOD INTO EVEN SMALLER PIECES.
• USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES. 

KERBOODLE PAGE 54

Chemical digeston step 1: 

• the place: the mouth (esophagus)
• the enzyme: amylase
• the liquid: saliva
• the nutrient: carbohydrates
• the products: glucose & maltose

• The enzymes in your saliva start breaking down the carbohydrate molecules into maltose and glucose.

Chemical digeston step 1: 

• the place: the mouth (esophagus)
• the enzyme: amylase
• the liquid: saliva
• the nutrient: carbohydrates
• the products: glucose & maltose

• The enzymes in your saliva start breaking down the carbohydrate molecules into maltose and glucose.

Chemical digeston step 2: 

• the place: the stomach
• the enzyme: protease
• the liquid: chyme and hydrochloric acid
• the nutrient: proteins
• the products: amino acids

• The enzymes in your chyme start breaking down the protein molecules into amino acids.

Chemical digeston step 2: 

• the place: the stomach
• the enzyme: protease
• the liquid: chyme and hydrochloric acid
• the nutrient: proteins
• the products: amino acids

• The enzymes in your chyme start breaking down the protein molecules into amino acids.

Use this image to make a summary of this lesson 

Include:

-Phases

-Organs

-Enzymes

HW for next time

- Start a summary using the cartoon

Include at least the phases and organs

- WB PAGE 26

- CONTINUE YOUR MINDMAP