I WONDER - How Do Joints Move Freely?

The video explains the similarity between door hinges and human joints, emphasizing the need for lubrication. It introduces synovial fluid as the natural lubricant for joints, allowing them to move freely.

What is the main similarity between door hinges and joints as mentioned in the video?

• Both require regular cleaning.

• Both need lubrication to function properly.

• Both are visible and tangible.

• Both are made of metal.

What is the purpose of comparing door hinges to joints in the video?

• To illustrate the need for lubrication.

• To highlight their differences.

• To show that both are made of metal.

• To explain how they are constructed.

Why is it challenging to lubricate our joints?

• They do not require lubrication.

• They are too small to reach.

• They are not visible or tangible.

• They are made of a special material.

What is the special fluid that helps joints move freely?

• Lubricant gel

• Joint oil

• Synovial fluid

• Hydraulic fluid

How does synovial fluid benefit the joints?

• It strengthens the bones.

• It helps them move freely.

• It makes them visible.

• It prevents them from growing.