The abdomen and the chest.
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The abdomen and the chest.
nape of neck
You have two cavities related to diaphragm. But the shape of diaphragm is dome shaped and you can say that abdominal cavity is directly interior to diaphragm.
Help in breathing and separation of thoracic and abdominal cavities .
diaphragm is muscular part made up of involuntary smooth muscles.it is nothing but a thin rubber dome with a springy and flexible rim.any dividing structure is acts as a diaphragm and is called so.a number of structures acts so.in body ,THORACIC DIAPHRAGM; a tissue of muscle separating thoracic and abdomen.it also plays important role in respiration.UROGENITAL DIAPHRAGM;a layer of pelvis separating deep perineal sac from upper pelvis.PELVIC DIAPHRAGM;a pelvic muscle consisting of levator ani and coccygeus.even iris and eardrum acts as a diaphragm.even it is used in birth control.;inserted in vagina and fitted over cervix and is held in place by vaginal muscles,this diaphragm holds spermicide in place over cervix.it kills sperms and prevent fertilization.thus the diaphragm acts as a dividing structure in various parts and divides body in various parts.