The system here obviously refers to biosystem or "his body." It sounds Canadian. Is it particularly favored to use by Canadians?
Context:
Glee's Cory Monteith overdosed on heroin and alcohol
Star was found dead in Vancouver hotel room on Saturday
CBC News Posted: Jul 16, 2013 2:05 PM PT Last Updated: Jul 16, 2013 4:37 PM PT
Canadian actor Cory Monteith died from a mix of heroin and alcohol in his
system, the B.C. Coroners service has confirmed.
"Post-mortem testing, which included an autopsy and toxicological analysis, found that Mr. Monteith, aged 31, died of a mixed drug toxicity, involving heroin and alcohol," said a statement release by the coroner on Tuesday afternoon.
More:
http://www.cbc.ca/news/canada/british-columbia/story/2013/07/16/bc-cory-monteith-drug-death.html