An AC system has many components: compressor, condenser, receiver dryer, evaporator, and hoses. The compressor, the âheartâ of the carâs air conditioning system works like a pump taking refrigerant, (R-12 in older cars, R-134a in 1995 and newer cars) and pressurizing it, passing it along to the evaporator. The AC compressor has several moving parts (including pistons and valves).
Quick Answer. According to WebMD, a normal blood pressure is lower than 120/80. This means that the systolic number is 120 or lower, and the diastolic number is 80 or lower. The systolic number measures artery pressure when the heart contracts. The diastolic number measures artery pressure between heartbeats.
May 30, 2008 (Indianapolis) -- If you have high blood pressure or are extremely overweight, walking may hold the key to improved heart health.That's the message from researchers who spoke here this week at the annual meeting of the American College of Sports Medicine (ACSM).hose with blood pressure readings between normal blood pressure and high blood pressure are considered to have prehypertension. The researchers measured the men's blood pressure following a 40-minute brisk walking session and four, 10-minute brisk walking bouts.