diaphragm meaning

noun . a thin layerof tissue stretched across an opening especial- ly the flexible sheet of muscle and fibre which separates the chest from the abdomen and moves to pull air into the lungs in respiration same as vaginal diaphragm COMMENT: The diaphragm is a muscle which in breathing noun . a thin layerof tissue stretched across an opening especial- ly the flexible sheet of muscle and fibre which separates the chest from the abdomen and moves to pull air into the lungs in respiration same as vaginal diaphragm COMMENT: The diaphragm is a muscle which in breathing expands and contracts with the walls of the chest. The average rate of respi- ration is about times a minute