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.
A SecondsCount.org answered. Most veins carry blood that is low in oxygen back to the heart. After the oxygen and nutrients have been delivered to the bodyâs tissues by the arteries and capillaries, a second network of venules and veins carries blood and waste products back to the heart. Smaller tubes, venules, pick up the oxygen-depleted blood and transfer it to the veins, which carry it back to the heart. Once the veins return blood to the heart, it is pumped to the lungs. Here, the carbon dioxide from the venous blood is expelled as we breathe out. The oxygen we breathe in is picked up by the blood flowing through the lungs.