Double pump. Blood carries oxygen and many other substances around your body. Oxygen from your blood reacts with sugar in your cells to make energy. The waste product of this process, carbon dioxide, is carried away from your cells in your blood. Your heart is a single organ, but it acts as a double pump.
On average, an ambulance company will charge anywhere from $350 to as much as $2,000 for a trip without insurance. Even with health insurance, an ambulance ride may not be covered 100 percent. According to this LaTimes.com article, a patient was billed more than $1,538 for her ambulance ride.
The ambulance business has horrible profit margins- 1-2% at most, and tried to cross-subsidize the loss they take on 911 a number of ways- by having the fire department provide the service and shifting some of the overhead costs to fire suppression, by having hospitals run the service, who can justify it as a marketing cost and cross-subsidize the ambulance with profits from admitted patients (but CAN'T actually bill for the ambulance if you are admitted to their hospital-there is a single ...