Richard is so funny.....

Lol was reading snell when i chanced upon this paragraph..... which i tot was rather funny.... i guess when you're writing a textbook and you're damn bored u tend to have a tendency to spice it up;p

Functions of the Diaphragm
Muscle of abdominal straining: Its contration aids that of the muscles of the anterior abdominal wall in raising the inta-abdominal pressure to evacuate the pelvic contents(eg defacation). This mechanism is furthur aided by the person taking a deep breath and closing the glotis of the larynx.
The diaphragm is unable to rise because of the air trapped in the repirtory tract. Once in a while, air is allowed to escape, producing a grunting sound.