About this video
This video explains why your knuckles crack when you pop them! It shows how special liquid in your joints helps protect them. You'll learn about synovial fluid and how it works.
🧠 Quiz & Trivia
Test your knowledge after watching!
Q1 What is the name of the special liquid in our joints?
Answer: Synovial fluid
Q2 What happens when you pop your knuckles?
Answer: Bubbles form in the synovial fluid.
Q3 How many times her own body weight does a gymnast put through her knees?
Answer: Up to 12 times
Comments (0)
No comments yet — be the first!