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).
They vary throughout the day. (Click here for a blood sugar chart.) For someone without diabetes, a fasting blood sugar on awakening should be under 100 mg/dl. Before-meal normal sugars are 70â99 mg/dl. âPostprandialâ sugars taken two hours after meals should be less than 140 mg/dl. Those are the normal numbers for someone without diabetes.
Systolic pressure measures blood pressure as the heart contracts and pushes blood through the arteries. Diastolic pressure is taken when the heart relaxes. Normal blood pressure is around 120/80 or lower. It is important to note that blood pressure varies from person to person and can fluctuate from moment to moment. One or two high readings does not necessarily mean that you have hypertension or high blood pressure.