CLEAN : Water cannons used by HK police to put out fire lit by protesters

What is the primary focus of the introduction section?

• Advanced arm mechanics

• Basic structure of the arm

• Arm-related diseases

• The history of the arm

Which component of the arm is responsible for movement?

• Nerves

• Skin

• Muscles

• Bones

What is the main function of the arm's bones?

• To provide flexibility

• To regulate temperature

• To protect internal organs

• To support and shape the arm

How do the arm's components work together?

• Randomly

• In coordination

• In isolation

• Independently

Why is the arm considered important in the human body?

• It is the strongest part of the body

• It allows for a wide range of activities

• It aids in balance

• It is the longest limb