| Now there are shoes with anti-gravitational pull devices, shirts with air circulation systems and shorts with built-in aerodynamics. |
| The circulation is then entirely of cold polar air, and there is little precipitation associated with such lows when they reach the polar areas. |
| A good exercise programme such as aerobics will also activate and rejuvenate the skin and improve circulation and blood flow. |
| These hard wood blocks were durable enough to withstand the thousands of printings necessary for magazines with national circulations. |
| Therefore the pulmonary and systemic circulations are in parallel and a communication between the two is needed. |
| Deep vein thrombosis also may affect the caval, innominate, cerebral, hepatic, portal, splenic, mesenteric, and renal venous circulations. |
