Question

1. Cardiac muscles are voluntary in action.
2. Ribcage protects the heart and lungs.
3. Muscles are attached to bones by ligaments.
4. Blood cells are made in the bone marrow.
5. Cartilage protects the bones by preventing them from rubbing against each other.​

Answer 1

Answer:

1. true

2. true

3. false

4. false

5. true