Skeleton

• Biologie
• Middelbare school
• havo
• Leerjaar 2

The skeletal system

Body systems

Today's lesson

• Human bones
• backbone + posture
• Development over time
• skeletal system functions

How many bones do you think the human skeleton has?

What is one bone in terms of the 'levels of organisation'?

1. Cells
2. Tissue
3. Organ
4. An organ system

Types of skeletons

• Endoskeleton
• Exoskeleton
• Hydrostatic skeleton
  
  
• Watch the video (6.50min) on the next slide to learn more about skeletons. 

Jellyfish have

1. Endoskeletons
2. Endoskeletons
3. Hydrostatic skeletons

Insects have

1. Endoskeletons
2. Exoskeletons
3. Hydrostatic skeletons

Humans have

1. Endoskeletons
2. Exoskeletons
3. Hydrostatic skeletons

www.mayoclinic.org

Watch the video about fontanelles (previous slide). Why does it help baby's to have these soft spots in their skull?

Drag and drop questions

Learning the names of some bones in our bodies. Drag the blue labelled terms to the correct places. 

Shinbone

skull

backbone

knee cap

lower jaw

ribs

shoulder blade

Skull

Rib cage

Pelvis

Backbone

Limb

The backbone

• All vertebrates have a backbone
  (birds, fish, mammals, reptiles, amphibians)
• A backbone consists of discs
• The backbone protects the spinal cord 
  (which carries nerve signals from the brain
  to organs and back)
• It also gives support to our bodies

The backbone and nerves

How do you think you can prevent a back injury like this?

Not a good posture! How are you sitting right now....?

List all functions of the human skeleton