How do the Systolic and Diastolic effect the heart???

I have already given definitions of the two in the previous question so I am unsure on how to answer this one with out just giving the definition as obviously that is not what they mean....any help??

Blood pressure is the amount of force (pressure) that blood exerts on the walls of the blood vessels as it passes through them. Two pressures are measured for a blood pressure reading:


Systolic blood pressure is a measure of blood pressure while the heart is beating

Diastolic pressure is a measure of blood pressure while the heart is relaxed, between heartbeats.

EFFECT OF SYSTOLIC AND DIASTOLIC BP ON THE HEART

As blood is pumped from your heart into your blood vessels, enough systolic and Diastolic blood pressure is created to send it to all other parts of your body.

As blood vessels travel away from the heart, they branch off and gradually get smaller -- just like a tree's branches. One branch may go to the brain while another may go to your kidneys.
Systolic AND Diastolic blood pressure keeps blood flowing through the branches so that your body's cells get the oxygen and nutrients they need and waste matter can be removed.

DIASTOLIC BP

High Diastolic Blood Pressure

If the diastolic blood pressure is too high, a person is said to have high blood pressure, which is also known as hypertension. High blood pressure means that the diastolic blood pressure reading is higher than 90.
In people with high blood pressure, the small blood vessels in the vital organs are most affected over time. These blood vessels become scarred, hardened, and less elastic, which means that they are more likely to get blocked or rupture (leading to organ damage or even organ failure).


Low Diastolic Blood Pressure
If the diastolic pressure is too low (known as hypotension or low blood pressure), the blood is not able to bring oxygen and nutrients to all the body's cells and remove waste matter. This can cause the cells to die. The diastolic blood pressure is considered low when the blood pressure reading is below 60.

SYSTOLIC


Low Systolic Pressure

If the systolic pressure is too low (known as hypotension or low blood pressure), the blood is not able to bring oxygen and nutrients to the body's cells and remove waste matter. This can cause the cells to die. The systolic blood pressure is considered low when the blood pressure reading is below 90.


High Systolic Pressure

If diastolic and systolic blood pressures are both too high, a person is said to have high blood pressure, which is also known as hypertension. With high blood pressure, the average systolic blood pressure reading is higher than 140 and the average diastolic blood pressure reading is higher than 90. If only the systolic blood pressure is higher than 140, the person has a condition called isolated systolic hypertension.

Kels