4.2 the structure of bones

• Biologie
• Middelbare school
• vmbo g, t
• Leerjaar 3

start task

1. Log in to LessonUp and complete the online assignment.
2. Copy the learning objectives into your notebook:

• You can name the characteristics of bones and cartilage.
• You can describe how the composition of bones changes throughout life.

skull

breastbone

collarbone

humerus

cervical vertebra

Sleep naar de botten die je 

ziet op de röntgenfoto:

* welke botten komen overeen met botten in het been? 

radius

elbow

ulna

metacarpals

carpals

Tekst

thighbone

bones of the foot

shinbone

fibula

bones of the hand

kneecap

Planning

1. Review of the previous lesson
2. New explanation
3. Complete assignments
4. Wrap-up

4.2 Botten

Learning objectives

• You can name the characteristics of bones and cartilage.

• You can describe how the composition of bones changes throughout life.

Bone & cartilage

In the nose and ears, there is flexible cartilage.

The rest of your body is mostly made up of bones. Bones break much more easily than cartilage.

Bone

Consists of calcium (kalk) and collagen (lijmstof).

Calcium is firm but breaks easily.

Collagen is flexible but strong.

Dit is een aantekening

lots of collagen

little collagen

         lots of collagen          lots of calcium

As you get older, the collagen disappears, and your bones will break more easily when you fall.

baby           adult          elderly

dit is een aantekening

Cartilage

Nose and ears, also between ribs and vertebrae.

A lot of collagen and little calcium -> more flexibility.

dit is een aantekening

question

Imagine: You drop a baby and an elderly woman.

Which one is more likely to break a bone?

Discuss in pairs!

answer

The elderly woman is more likely to break a bone because the bones of older people contain less collegen and more calcium than the bones of younger people.

This makes the bones of older people more brittle (fragile), while the bones of younger people are more flexible.

work

Assignments 1 - 7 (skip 4).

Pages 17 - 20.

Use the theory from section 2!

Finished?

- Complete bs 1, assignments 1-8

- Check your work (via Classroom)

- STUDY: bones!

Bottenbingo