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digestive system-2
Digestion
have ready: your homework questions
Topic of today: absorption and egestion
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Slide 1:
Slide
Biologie
Middelbare school
vwo
Leerjaar 2
This lesson contains
16 slides
, with
interactive quizzes
,
text slides
and
2 videos
.
Lesson duration is:
30 min
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Items in this lesson
Digestion
have ready: your homework questions
Topic of today: absorption and egestion
Slide 1 - Slide
Slide 2 - Video
match up activity
You will get cards with names/ functions/ pictures of a part of the digestive system.
Match up the cards
Lay them out in the order of which it is found in the digestive system.
Slide 3 - Slide
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.
Slide 4 - Drag question
Amylase is an example of
A
Carbohydrase
B
Lipase
C
Protease
Slide 5 - Quiz
During the break down of proteins you get:
A
glucose
B
amino acids
C
fatty acids
Slide 6 - Quiz
Small intestines
Place where everything is digested into the smallest building blocks
carbohydrates into glucose molecules
proteins into amino acids
fats into glycerol and fatty acids
Slide 7 - Slide
The circulatory system
is responsible for getting the nutrients from the small intestines to the rest of the body.
But first the molecules have to get from the small intestines to the blood
this is called absorption
Slide 8 - Slide
small intestine
is very long-> 6 meters
has many fingerlike projections-> Villi
Large total surface area -> making absorption go faster
Slide 9 - Slide
Characteristics of villi
One cell layer thick (thin walls for faster absorption)
Good blood supply (fast transport of nutrients to the rest of the body)
Slide 10 - Slide
Appendix
It has no function but can become infected and has to be removed.
Slide 11 - Slide
Large intestine
Mainly fibre, dead cells, bacteria and water
Water absorbed in the blood
waste product becomes more solid-> faeces
Slide 12 - Slide
bacteria
many bacteria live inside the digestive tract
they help with digestion
produce vitamins (K)
Much research is being done.
'Poepbank'
Slide 13 - Slide
Where does faeces collect?
in the RECTUM
when enough is collected the brain signals for elimination
this is called EGESTION
Slide 14 - Slide
homework
Do questions digestion #2 1-10
Study for the Glossary Quiz
Slide 15 - Slide
Slide 16 - Video
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