Why does the upper left quadrant have muscle spasms?

When your muscles move your ribs to make the lungs bigger or smaller? What are precaution when preparing meal for asthmatic child? What system is not affected by nerve agents? When a woman squirts beside feeling like your going to pee does the fluid feel hot? Is the sebaceous gland the part of the hair structure that supplies the hair with nutrients necessary for growth? Does silverfish has a circulatory system? What is stress in phonetics? Which bone articulate with metatarsal bones? Can you use surgical spirits for acne? Is the Lowest arterial blood pH tolerated by humans is 5.5? Are nose bleeds in teenagers common? What structure is responsible for the strength of attachment between the epidermis and dermis? Can a person with severe hemophilia join the military? What is wrong if your back hurts when you move your legs and bend but not getting hit there? How many people in the US are paralyzed? What is the name of swine flu vaccine? What makes Superman weak? Does puberty make you tired and sleepy? What is the sharpness of vision known as? How can you tell if you have phimosis or am starting puberty late?