There are four types of muscle contractions:
Isometric: The muscle contracts, generating energy without changing the length of the muscle.
Isotonic: The muscle contracts and generates force while changing the length.
There are two types if isotonic contractions; 1. Eccentric: the muscle lengthens. 2. Concentric: the muscle shortens.
We mainly use isotonic contractions when working out or weight lifting and isometric most of the day which include using forearm muscles, calves, etc...
I think you get it at 13 I think I think
Answer:
b. larynx
Explanation: hope this helps :)
Fats should be your answer because they need vitamins and minerals.