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Diastolic: Referring to the time when the heart is in a period of relaxation and dilatation(expansion).

Systolic: The blood pressure when the heart is contracting.

Measuring the pressure into and out of the heart.

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14y ago
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10y ago

It's because the heart does not pump continuously to have one presure reading. It contracts (systolic pressure) and it relaxes (diastolic pressure). Even when the heart relaxes, there is still pressure to keep the blood flow forward.

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Q: Explain why blood pressure is expressed with two numbers?
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What type of blood pressure is produced when the heart is in a relaxed state?

The measurement of blood pressure results in two numbers: the systolic blood pressure and diastolic blood pressure. This is expressed as a fraction: systolic over diastolic. The diastolic blood pressure is produced when the heart is in a relaxed state. It is the measure of the pressure exerted on the arteries during diastole, or relaxation.


Blood pressure is a measurement of what?

Blood pressure is the measure of the force of the blood against the walls of the blood vessels that it is contained in. Blood pressure is usually expressed in mmHg as the systolic pressure divided by the diastolic pressure.


What is blood pressure expressed in?

Millimetres of mercury (mmHg)


What in your body is expressed in millimeters and mercury?

Blood pressure


What is the best way to explain to an 11 year old exactly what blood pressure is?

To explain to an 11 year old exactly what blood pressure is I suggest you to let him see a video about the blood pressure. visual for kids is the best .


They're two numbers that are recored when blood pressure is takenwhat are the two numbers?

A person who is apt in measuring blood pressure using the sphygmomanometer records two numbers. The first one is the systolic blood pressure while the second one is the diastolic blood pressure.


What numbers represent normal blood pressure?

Normal blood pressure is measured by two numbers that represent how much mercury is in your blood. A completely normal blood pressure reads: Below 120 / below 80.


Force blood puts on vessels?

This is called blood pressure. It is measured using a sphygmomanometer and is expressed in a fraction format. For example, a normal BP is considered to be 120/80. The top number is the systolic pressure, which is the pressure exerted on the blood vessels during a heart beat. The lower number, diastolic pressure, is the pressure when the heart is at rest. The difference between these numbers (40) is the pulse pressure. This is the pressure your heart is actually creating, or how hard it is working.


Explain the readings for systolic and diastolic pressure that is what is actually happening?

What does the BP numbers mean? The number on the top is the systolic blood pressure and the number on the bottom is the diastolic blood pressure. The systolic BP is the pressure in the arteries right when the blood is pumped out of the heart, therefore the pressure is bigger. The diastolic BP is the pressure in the arteries after the blood has been pumped out and before the next heart contraction. At this moment, the heart is relaxed and the pressure is much lower.


Is blood pressure is a qualitative variable?

No,Blood pressure is a quantitative variable because it is measured in numbers


Why blood pressure is expressed with two number?

When a blood vessel (like an elastic pipe) is empty there is no pressure on its wall. When there is blood flowing in a blood vessel it exerts pressure on the walls of the blood vessel (pipe). This is the basal pressure called the Diastolic pressure (The lower of the two numbers). When the heart pumps blood it drives the blood with force and this exerts higher pressure on the walls of the blood vessel. This is called the Systolic pressure, the higher number in the blood pressure measurement. Thus, Blood Pressure of 120/70 means the systolic pressure is 120 and the diastolic pressure is 70.


What is blood pressure-?

Blood pressure is the pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.