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.
Oxygen enters the lungs, then is picked up by haemoglobin molecules in the blood within pulmonary veins. The pulmonary veins carry the blood back to the heart, where it is then pumped through the systemic system, via the Aorta (the artery that carrys oxygenated blood throughout the body).rom the capillaries, it enters the Vena Cava (the vein that carries the deoxygenated blood back to the heart). From the heart, the blood is pumped back to the lungs, through the pulmonary artery-where the blood picks up yet more oxygen to repeat the process.