14, 2003, at the Bundaberg Base Hospital.
The case opened in the Brisbane Supreme Court, with Crown prosecutor Peter Davis opening the Crown's case in five parts.
62-year-old Patel has pleaded not guilty to the manslaughter of Morris.
Prosecutors presented the arguments to a 12-member jury on the first day of the trial, Herald Sun reported.
Crown prosecutor Davis said that Crown was not suggesting "for one moment" that the accused intended to kill or badly harm the patient, Morris, rather that he had been "criminally negligent".
"The accused performed some medical procedures on Mr Morris," Davis said, adding "The Crown case is that as a result of those medical procedures, Morris died".
"A failure to take reasonable care and or have reasonable skill leaves the doctor criminally liable for the consequences of that negligence," Davis said.
"The accused was under a legal obligation to take reasonable care and reasonable skill in administering treatment to Mr Morris," he said.
The court heard Patel performed two operations on Morris in May, 2003, after the man complained of rectal bleeding and stomach pain.
The first, and major, procedure on May 23, 2003, was a "sigmoid colectomy and colostomy", an operation to remove part of the bowel and connect it to an opening in the abdomen, through which faeces could pass into a colostomy bag.
Davis said that though Patel did not perform the operation "incompetently" however, the surgery should not have been done at all.
Davis said Morris was old, had a "poor heart", liver problems, and potentially cancer, meaning he was not suitable to be subjected to such a "significant" and "unnecessary" operation.
The court heard that Morris's health declined after the first procedure Patel performed on him and following a second operation on May 30, 2003, to repair a dehiscence or "breaking open" of the original surgical wound.
"You will hear experts say they were caused by the operation and the failure of the accused to give appropriate post-operative care," Davis said.
Davis said the operation had been done for "no good reason" and it had "killed him (Morris)".
The jury was selected on Wednesday after a lengthy and exhaustive empanelling process, a first in Australia.
Judge George Fryberg said it was essential the jurors were impartial due to the "massive and prejudicial publicity" the case had sparked in the past.