diaphragm: (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
membrane: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
jerusalem thorn: large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America but naturalized in southern United States