If you mean Systemic & Pulmonary, that's because they're separate systems.
If you mean systolic & diastolic, then they're not different;
they represent highest and lowest pressure of each stroke of the heart.
The measure of the force of blood is called blood pressure. It is typically measured in millimeters of mercury (mmHg) and consists of two values - systolic pressure (when the heart is contracting) and diastolic pressure (when the heart is relaxing).
The two main types of barometers are mercury barometers, which use a column of mercury to measure air pressure, and aneroid barometers, which use a small metal box that expands or contracts with changes in pressure to indicate atmospheric pressure.
The two types of regions in a compressional wave are compression regions, where particles are close together and experience high pressure, and rarefaction regions, where particles are spread apart and experience low pressure.
Manometers can be classified into two main types: mercury (fluid column) manometers and pressure-sensing element manometers. Mercury manometers use the height of a mercury column to measure pressure, while pressure-sensing element manometers use a diaphragm, Bourdon tube, or bellows to measure pressure.
Blood pressure is typically measured using a device called a sphygmomanometer. This device consists of an inflatable cuff that is placed around the upper arm, a pressure gauge or digital monitor to measure the pressure, and a stethoscope to listen to blood flow. The measurement is given as two numbers, systolic pressure (the higher number) and diastolic pressure (the lower number), measured in millimeters of mercury (mmHg).
white blood cells and red blood cells
No, there is no limitation on people of different blood types reproducing.
There are two different types of A blood types, there is the one that originated from Europe and one that originated from the Arctic. The two blood types have specific properties and each require certain foods to be healthy.
Different proteins cause different blood types. A and B are two different proteins, as is M and N. O is the absence.
There are two types of Rh blood type, a Rh + and a Rh -ve, they are useful in surgery so blood type can be matched. Especially in pregnancy it is beneficial for mother and child to have the same Rh blood type.
It is a measure of the pressure of the blood in your arteries at two stages of the heartbeat.
High pressure and low pressure.
Blood type AB has both A and B antigens on their red blood cells, but neither type of antibody on their plasma. AB blood is a relatively new type of blood, having developed as a result of changing environments, and the co-mingling of two different blood types.
The Inuit and Alaskan Indians come from two completely different ancestorial origins. So different that they have two different blood types.
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.
it could be.
Blood pressure is the amount of blood per section of your blood vessels. You have two different readings because blood pressure varies; for example, your blood pressure is higher after heavy exercise due to the fact that your heart is pumping blood faster.