2.2.2 digestive system + start 2.3 organs for digestion

• Biologie
• Middelbare school
• vmbo t, havo
• Leerjaar 2

start task

1. Join this LessonUp, using only your first name.

Learning goals (repeat): After this lesson you will be able to:

- describe the function of digestion, digestive juices and enzymes.

- describe what peristalsis is.

planning

1. Quiz on knowledge assignments: 1 to 4.
2. Complete insight assigments, 5, 6, 7 and 8.
3. Read section 2.3, 104-107, start asg. 1

Leerdoelen: Na deze les kun je:

- de werking van spieren beschrijven.

Leerdoelen: Na deze les kun je:

 - de functie van vertering, verteringssappen en enzymen beschrijven.

- beschrijven wat darmperistaltiek is.

Learning goals: After this lesson you will be able to:

- describe the function of digestion, digestive juices and enzymes.

- describe what peristalsis is.

When large nutrients are broken down into small substances, you get _________________. These small substances can pass through the ________________ into the ________________ and be absorbed.

During digestion, food is first broken into small pieces by being _________________. This ________________ the surface area. Then, the nutrients are ________________ with the help of _________________.

Many nutrients must first be digested. Complete the text.

broken down

blood

intestinal wall

chewed

increases

digestive products

digestive juices

1a. 

What substances have to be digested first before they are absorbed into the blood? 

1. proteins/glucose/ minerals/fats/starch
2. glucose/minerals
3. proteins/fats/starch
4. glucose/starch

1a. 

Digestive juices are used in ___________ digestion.

1. chemical
2. mechanical

1a. 

Chewing food is part of the ________ digestion process.

1. chemical
2. mechanical

1a. 

Digestive enzymes are part of the ______________ digestion process.

1. chemical
2. mechanical

1a. 

Enzymes _______________ up digestion.

1. slow down
2. speed

2a

The function of the teeth is breaking food up into smaller pieces.

2b. What two benefits does it have for further digestion?

3a. At position P, the ______________________ muscles contract.

1. circular muscles
2. longitudinal

3a. They make the intestines ______________.

1. narrower.
2. wider

3a. At position Q, the ______________________ muscles contract.

1. circular muscles
2. longitudinal

3a. The lump of food is moved 

from ____ to ____.

1. P to Q
2. Q to P

Dietary fibre has an influence on the digestion of food.

2b. Put these events in the correct sequence.

1

2

3

4

What	Complete insight assigments 5, 6, 7 and 8 (p. 102-103).
How	You may quietly work together with your neigbour. Write the answers in your zuidschrift.
Help	1) book 2) class mate 3 ) teacher
Time	20 minutes
Done?	Finished? - read pages 104-107 - start assigment 1 (p.108) - check & correct your answers (classroom).

Review

What is mechanical digestion?

What is chemical digestion?

Name two digestive glands.