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.
These arteries supply oxygen-rich blood to the organs and tissues of the body, which require oxygen to function. The coronary arteries supply oxygen-rich blood to the tissues of the heart. Oxygen-poor blood travels from organs and tissues to the heart through veins. The vena cava is the major vein that returns blood to the right atrium of the heart. The vena cava superior returns blood from the head, neck, upper extremities, and chest. The vena cava inferior returns blood from the lower ...