Materials of the skeleton

Bone bingo
Discussing homework 
Explaining about bones (TB p. 96)
Making homework
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Slide 1: Slide
Biologie / VerzorgingMiddelbare schoolmavo, havoLeerjaar 1

This lesson contains 13 slides, with text slides and 1 video.

time-iconLesson duration is: 30 min

Items in this lesson

Bone bingo
Discussing homework 
Explaining about bones (TB p. 96)
Making homework

Slide 1 - Slide

What are we going yo learn?
Today we will be learning:
What a bone consists of. 
What bone is made out of. 
What the different function of bone is. 

Slide 2 - Slide

Parts of bones
Even though it looks like a bone doesn't do a lot. It's a living thing! Notable parts: Red and yellow bone marrow

Slide 3 - Slide

Compact and spongy bone tissue

Slide 4 - Slide

Materials of bone
Your bone has to be strong; you wouldn't be solid if it wasn't. 
Still, a bone needs to flexible at the same time. Why? Things that are just hard tend to break quicker, because they can't absorb the energy of impact. 

Slide 5 - Slide

Materials of bone
That's why your bone consists of 2 materials: calcium and collagen. Calcium makes the bone hard and sturdy, while collagen makes it a bit more flexible. 

Slide 6 - Slide

Samenstelling bot
Cartilage has a lot more collagen, whereas normal bone has more calcium. 

Slide 7 - Slide

Getting older
When you are a baby, your bones have more collagen. As you grow older however, the amount of collagen will decline while the amount of calcium grows. 

Slide 8 - Slide

Getting older
Because of this you generally break bones more easily as you get older. Besides that, your bone tissue slowly begins to degrade. This is called osteoperosis

Slide 9 - Slide

Breaking bones
Afte you've broken a bone, your body goes to work and tries to fix this. It does this first by breaking down the damaged bone cells (the cells responsible for this are called osteoclasts). After that, osteoblasts make new bone tissue. 

Slide 10 - Slide

You bones are also responsible for growing. In your legs and spine are growth plates, that extend the length of the bones. The cartilage on the outsides of these bones are responsible for that. 

Slide 11 - Slide

Slide 12 - Video

Homework exercises
The homework exercises for next lesson will be all the exercises of paragraph 4.3. You can start with them now. 

Slide 13 - Slide