Bones, Joints and muscles.

Question 1

What is a skeleton?

Answer 1

A structure made by bones and joints

Question 2

What is the job of the skeleton?

Answer 2

• supports your body
• allows it to move
• protect important organs

Question 3

What is a vertebrate? Give me an example.

Answer 3

Vertebrates have an INTERNAL skeleton and a BACKBONE

• Fish
• Mammals
• Reptiles
• Birds

Question 4

What is an external skeleton and what is it made of?

Answer 4

A skeleton on the outside of the body instead of the inside (internal skeleton), it is made out of CHITIN.

Question 5

Which organisms have an external skeleton?

Answer 5

Insects

(Insects keep on chitin-synthesis and produce chitin to replace the old one, once the old one is dry, they break out of it.)

Question 6

What are the advantages of an internal skeleton compared to an external skeleton?

Answer 6

• easily grow along the body
• easy to attach muscles to bones
• More flexible compared to an exoskeleton
• Gives the body support and provide a framework