The ability of the muscles to exert a force is called Muscular strength.
Explanation:
Muscular strength is the ability of the muscles to exert force. It can be measured by the amount of weight a person can lift. Those who have good muscular strength suffers less backaches, hence carry out the daily task efficiently. Examples are push ups, heavy weight lifting with repetitions and pull -ups. They are good because it can increase the potential to carry forward certain task like opening the door, lifting boxes, chopping woods without getting tired. It can lead to stronger, healthier bones as well as muscles.
I believe it’s carbon dioxide, because you use your respiratory system to breathe in oxygen, and oxygen goes through your circulatory system. And you breathe out CO2.
