WDP Lesson 3 (by Mr Ng)

Lesson 3 (26/09/07)

Dream of flight

Why can birds move in the air?

• Wings
• Flight muscles
• Feathers
• Streamlined body shape
• Hollow bones

Wings

• Birds have wings that are well developed for flying.

Flight muscles

• Birds also have strong strong flight muscles for

flapping their wings.





Feathers

• Birds have feathers.
• Feathers make light but strong wings.
• Feathers keep the birds warm and also ensures that flight muscles can work properly.
  
  
  

Streamlined body shape

• Streamlined body shape helps birds to overcome the force of air when flying.
  
  
  
  
  
  Hollow bones
• Bones are hollow yet strong
• Reduces bird's body weight to make flying easier.