The nervous system get messages from the brain telling the muscles to react.
The whole point of having systems in the human body is to create interconnectivity. There is no one system that 'relates' to the muscular system; they all do. The vascular system provides nutrients to supply the muscles with glucose for respiration and to transport hormones that may cause some smooth muscles to contract or relax. The endocrine system provides the hormones that may change the behaviour of the muscles of the body in a particular region. The nervous system connects the muscle to the central nervous system, which allows us to react quickly to stimuli. The respiratory system provides the oxygen for aerobic respiration in the muscles. So, as you can see, there is no single system that is connected to the muscular system.
Skeletal muscles react very quickly of all three muscle type, probably.
its false... skeletal muscles cannot react quickly and they don't tire easily...
Generally not. The striated (skeletal muscles) usually act quickly. Smooth muscle is found in blood vessels and the gut and contract more slowly and tonically.
respiratory
The advanatage of agility training, is that you are training your muscles in your body to react quicker, so if in a game situation, and you need to dodge around a player, then your muscles can react quickly to work explosively to move from one point to another as quickly as possible.
Yes. You are correct. The rapid movement causes them to use more energy and build up more lactic acid so they tire faster.
The nerves can react in milliseconds.
because it makes you react quickly by using fast twitch fibres in your body which makes your muscles react.
Involuntary can (and does) work continuously (all your life).
muscles react,which means they increase in size