1. five movements that are voluntary: biceps, triceps, quadriceps, diaphragm and hamstrings
2. five movements that are involuntary: breathing, digestion, heart beating, eye reflexes and salivation
3.it is possible because muscles retract and extend
4.when the muscles contract and relax it pulls the bone into a different position which makes it move hence the muscles know when they’re supposed to move because they’re under control of your nervous system and the most important part of your nervous system is the brain and the brain is kind of like your body’s command center
5. 600 muscles
brainliest please :)
