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what causes particles to slow down and contract
the force with which what the contract causes blood pressure
Ice - it causes tissues and blood vessels to contract - thus reducing swelling.
something to do with external regulators not working right
Medicinal cannabis causes the muscular system in the human body to contract or relax. Try it :)
well, sometimes your nervous so you will bite your lip. Sometimes something will hurt and you will bite. There's a lot of different reasons!
cold
First of all have a look if you have enough suction and check that there is not something caught up in it.
Meat
Oxytocin.
vasoconstrictor
they are on separate fuses sometimes. check fuses, or wires