wicked-naughtily or annoyingly playful; teasing and worrying with impish laughter; a wicked prank. impish, implike, mischievous, pixilated, prankish, puckish, arch. playful-full of fun and high spirits; playful children just let loose from school.
Inspiratory Muscles. The principal muscle of inspiration is the diaphragm, a domed sheet of muscle that separates the thoracic and abdominal cavities. The diaphragm attaches to the lower ribs, as well as to the lumbar vertebrae of the spine.
diaphragm and intercostal muscles inspiratory muscles relax, reducing thoracic volume, and the lungs recoil. volumes of the pleural cavity and the lungs decrease, causing the pressure to increase in the lungs, and air flows out.