What produces striations in muscle fibers?

i know i chose health, but its the closest thing they have to human anatomy.

1. "i need to create calories."

2. my friend sitting next to me.

3. answering questions on

4. the show dynasty.

5. 4: 20.

6. 3: 44

7. my friend watching netflix.

8. walking from the car to my friend's house.

9. yes.

10. some.

11. 2 minutes ago.

12. when i wrote "i need to create calories."

12. sea-foam paint.