Three ways to ask the same question (for a 7-year-old):
- 1. What holds my bones together?
- 2. How do bones stay joined?
- 3. What keeps my bones from falling apart?
Simple explanation — step by step:
- Bones meet at places called joints. A joint is where two bones come together, like your knee or elbow.
- Strong bands called ligaments hold the bones together. Ligaments are like stretchy ropes that keep the bones from moving the wrong way.
- Soft cushions called cartilage protect the ends of bones. Cartilage stops the bones from rubbing and makes movement smooth, like a little pillow between them.
- Muscles and tendons help move and steady the bones. Tendons attach muscles to bones. When muscles pull, tendons pull the bones so you can swing your arm or kick a ball.
Quick example: In your knee, ligaments hold the bones together, cartilage cushions them, and muscles/tendons move and steady the knee.
If you want, try this: gently bend and straighten your elbow. That moving place is a joint — ligaments, cartilage and muscles are all helping it work!