Cette leçon contient 11 diapositives, avec diapositives de texte et 1 vidéo.
La durée de la leçon est: 30 min
Éléments de cette leçon
Welcome!
Today:
Bone bingo
Discussing homework
Explaining about bones (TB p. 16)
Making homework
Slide 1 - Diapositive
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 - Diapositive
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 - Diapositive
Compact and spongy bone tissue
Slide 4 - Diapositive
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 - Diapositive
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 - Diapositive
Materials of bone
Cartilage has a lot more collagen, whereas normal bone has more calcium.
Slide 7 - Diapositive
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.
Babies also have fontanels: space between the skull bones.
Slide 8 - Diapositive
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 - Diapositive
Slide 10 - Vidéo
Homework exercises
The homework exercises for next lesson will be all the exercises of paragraph 4.2. You can start with them now.
La durée de la leçon est: 30 min
