Learnbeat BS. B - Bones and Cartilage SRN

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Learnbeat unit:

Movement

B. Bones and cartilage

How many bones does the human skeleton have?

1. 406
2. 206
3. 270
4. 311

Why do we have a
skeleton?
=

Functions of the skeleton

1. Support: keeps the body up and keeps organs in place
2. Movement: by using muscles
3. Protection: keeps soft inner organs safe
4. Storage of minerals and fats
5. (Production of blood cells)

What is the main function of your skull?

1. protection
2. movement
3. support
4. blood cell production

Today's planning

- Learnbeat B. Bones and cartilage

- Making some assignments

- Demo bones (collagen & calcium phosphate)

- Using the microscope and making a biological drawing of the cells

Skeleton

Skeleton

Consist of 3 parts: head, torso, limbs

Has two different types of tissue: 

- Bone tissue (botweefsel) 

- Cartilage tissue (kraakbeenweefsel)

Movement

§2 Bones & Cartilage

Collagen and calcium phosphate 

Bones and cartilage consists of different substances. The most important are collagen and calcium phosphate. 

Collagen: makes a bone flexible

Calcium phosphate: makes a bone strong and hard

Bones

Give strength, let us move and stand upright

Contain calcium phosphate and a bit of collagen

Cartilage

Firm, but very flexible.

Contains a lot of collagen

Protects bones from damage and makes sure movement is possible.

Bone tissue under a microscope 

Cartilage tissue under a microscope

Cartilage tissue (kraakbeenweefsel):

- Cells in small groups

- Elastic extracellular material

- Mainly collagen

Bone tissue (botweefsel):

- Cells in circles around blood vessels

- Firm and hard extracellular material

- Mainly calcium phosphate and collagen 

A change in bone tissue

When younger --> more collagen, less calcium phosphate in bones

When older --> more calcium phosphate, less collagen in bones

Welke grafiek is dan juist?

What makes bone flexible?

1. collagen
2. calcium
3. cartilage

What substance makes bone strong?

1. collagen
2. calcium phosphate
3. cartilage

comparing skeletons

The skeleton can tell us something about 

-where an animal lives

- what it eats

- what it looked like in the past

Protection

Sommige delen van het lichaam bieden bescherming. 

Welke delen denk jij?

Schedel: klopt! 

De schedel beschermt de hersenen 

tegen botsingen, als een helm. 

Nekwervels: klopt!

Ze beschermen de zenuwen van en naar de hersenen.

Borstkas: klopt!

Dit beschermt de zachte en weke ingewanden zoals het hart, de darmen en de longen. Anders zou alles uit je lichaam zakken! Jakkes! 

Botten: nee

Dit geeft stevigheid aan het lichaam. de speieren zitten aan de botten vast, en zo kunnen de botten bewegen. 

(Hoef)nagels: klopt!

De nagels beschermen de poten tegen beschadiging en verwonding. 

Bij sommige dieren zijn de nagels zelfs een wapen! 

Get to work

Go to learnbeat 

Finish the assignments within A - the skeleton

Start with the assignments of B - bones and cartilage

What do you remember? 

- Working with a microscope?

- Making a biological drawing?

- Collagen and calcium phosphate?