Imagine a complete dinner in front of you. dedscribe the process of digestion and excretion that will
take place in your body as food enters and waste products are later removed.

Well the food will enter and be covered in saliva and then fall into the stomach and be processed by all of the acid(the food will be there for a decent amount of time) and than go to your small intestine  there it will be put down to size and remove all of the other particles and chemicals, then it will go to the large intestine and dry off and you well then get rid of the waste from your system, otherwise poop it out.   

Hyper extension is the extension of a limb/body part beyond its limits

Ibelieve the main term is cholecystitis. acute is just describing the condition.