X6 highlights. October 15, 2015: BMW X6M has been launched at a price tag of Rs. 1.60 Crore (ex-showroom Chennai). Under the hood, the car features a 4.4-litre Twin Turbo V8 that produces will 575 PS of power and a humongous torque of 750 Nm and is the most powerful motor ever developed by BMW.
Supply and demand. The coronary arteries regulate the supply of blood to your heart muscle depending on how much oxygen your heart needs at the time, as indicated by: 1  The number of times your heart beats per minute (heart rate). 2  Your blood pressure. 3  The force of your heart's contractions. 4  The thickness of your heart muscle.
One of the main jobs of the cardiovascular system is to deliver oxygen (O2) to the body. As our bodies work, it uses up oxygen, replacing it with carbon dioxide (CO2). The exchange of oxygen and carbon dioxide occurs in our lungs. The blood that reaches our lungs has a lot more CO2 than O2.