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BS 2 - The structure of bones
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Slide 1:
Diapositive
Biologie
Middelbare school
havo
Leerjaar 1
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Slide 1 - Diapositive
Slide 2 - Diapositive
self reading
where: pg 14 / 15
Slide 3 - Diapositive
Bones and cartilage
The skeleton consists out of 2 types of tissue:
Bone (bot) and cartilage (kraakbeen)
But..
What are bones made of?
Slide 4 - Diapositive
BS 2 - The structure of bones
Slide 5 - Diapositive
Today's lesson
1. Check HW
2. Do paragraph 4.2 - The structure of bones
3. Exercise 2 pg. 72
4. Review questions
Slide 6 - Diapositive
self reading
where: read on page 13 t/m 15( text book)
how: alone and in silence. one person is reading loud for the class
time: 5 min
Slide 7 - Diapositive
Structure of bones
Bones exist out of
calcium phosphate
(=kalkzouten) and
collagen
(=lijmstof).
Calcium phosphate
makes the bone strong and rigid.
Collagen
makes the bone flexible
Slide 8 - Diapositive
Slide 9 - Diapositive
Changes of bone tissue
The skeleton of a baby consists mostly of cartilage tissue.
During growth, most of the cartilage changes to bone.
When you get older:
--> Amount of collages decreases
--> amount of calcium phosphate increases.
Slide 10 - Diapositive
baby is flexible because they have a lot of collagen in their bones
Old people break bones easier because they have less collagen.
Slide 11 - Diapositive
Where do bones exist of?
A
Collagen and calcium phosphate
B
Cartilage and calcium phosphate
C
cartilage
D
collagen
Slide 12 - Quiz
Do the bones of older people have more collagen?
A
yes
B
no
Slide 13 - Quiz
Do the bones of baby's have more calcium phosphate?
A
yes
B
no
Slide 14 - Quiz
Cartilage has more collagen than calcium phosphate. This makes cartilage ...
A
flexible
B
strong
Slide 15 - Quiz
What material is in a nose?
A
Cartilage
B
Bone
Slide 16 - Quiz
What makes bone strong?
A
collagen
B
calcium
C
cartilage
Slide 17 - Quiz
What material is in this bone?
A
Cartilage
B
Bone
Slide 18 - Quiz
Your ear is made of....
A
cartilage
B
spongy bone
C
compact bone
D
marrow
Slide 19 - Quiz
Slide 20 - Vidéo
practical
where : page 12 t/m 15
how: in pairs
time: 10 min each practical
read the instructions carefully
Slide 21 - Diapositive
Slide 22 - Vidéo
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