U4 B2 structure of bones

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

B2 the structure of bones

• Take off your jacket
  
• Put your things on your desk
  

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 16-17

Lessongoals

• You can describe the structure of bone tissue and cartilage tissue.
• You can describe how the composition of the bones changes during a person's life

Today

• Recap
• Bones and cartilage
  
• Bones during a persons life
• Time for hw: 4.2 ex. 4, 7 and 8
  
• End

Homework

4.1: ex. 5, 6 and 8

Summary skeleton

* Names of these bones: (three "live" examples)

* Four functions of skeleton: 

1 word

1 word

1 word

Which of these bones is not connected to a vertebra?

1. Pelvis
2. Kneecap
3. Skull
4. Rib

What function of a skeleton is shown in the story underneath?
Jack is in love with a girl from his class. He is most attracted to her face.

What isn't a function of the skeleton?

1. Giving shape to the body
2. Making movement possible
3. Keeping organs in their spots
4. Protecting organs

Calcium phosphate

Bones partly consist of calcium phosphate

• strong and rigid
• doesn't bend very well

Collagen

Bones partly consist of collagen

• bends easily
• not very strong/rigid

Cartilage

Bone

cartilage cell

extracellular material

extracellular material

bone cell

process

canal

Mostly collagen in the extracellular material.

Makes cartilage very bendy and flexible

A lot of calcium phospate, but also some collagen in the extracellular material.

Makes bones rigid, but also keeps it from breaking

Bones need blood to stay alive/strong canals are filled with bloodvessels.

Young to old

• Baby's > mostly cartilage > lots of collagen
• A Baby has fontanelles

• Older people > Bones with little collagen

What you should do:

• Read pages 16-17
• Do ex. 4, 7 and 8 pgs. 17-19

Done with the above?

• Read 4.3 and 4.7
• Make 4.7 – ex. 1 (Attention - B7!)
• Make 4.3 – ex. 1, 2, 3, 5 and 6

• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 16-17
  
• Do ex. 4, 7 and 8 pgs. 17-19
  

Done with the above?

• Read 4.3 and 4.7
  
• Make 4.7 – ex. 1 (Attention - B7!)
  
• Make 4.3 – ex. 1, 2, 3, 5 and 6
  
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish