The circulatory system
A flow chart, like this one, shows how a process begins and ends, and the steps in between .
The process can be of almost any kind, From manufacturing a tiger to creating an advertisement .
Therefore, learning how to describe and explain a progress in English is important.
It's important for teachers engineers and people who provide customer support .
One process that we are all familiar with is our body's circulatory system .
This system provide oxygen throughout the body and eliminates Carbon dioxide ,Which is a waste product .
If something goes wrong with this system, we need to repair it quickly ,or we die .
So it's important to understand it and keep it functioning properly .
It's important to keep it functioning properly or we will die .
It's important for teachers engineers and people who provide customer support
First, the most important requirement for the system to work is a supply of air .
Without fresh air with sufficient oxygen , the process won't keep us health and alive.
So the process begins by breathing in the air ,Which happens when the lungs expand and draw in air.
Once inside the lungs, Oxygen in the air is exchanged for carbon dioxide in the blood .
This exchange happens when blood cells release carbon dioxide and absorb oxygen .
This blood is now oxygenated blood , which means it carries oxygen .
After exchanging carbon dioxide For oxygen ,Oxygenated blood flows to the heart .
From the heart it is pumped to the rest of the body .
The carbon dioxide Which was exchanged for Oxygen Is breathed out .
This happens when the lungs contract .
To summarize ,The process begins by Inhaling air and Oxygenating the blood .
The oxygenated blood in the lungs then flows back to the heart .
The CO2 which came from the blood is exhaled , And the next cycle begins .
Note that the blood in the lungs flows in a loop from the heart .
The blood which enters the loop from the heart carries carbon dioxide .
once the carbon dioxide is exchanged for oxygen, the blood continues through the loop and exists into hurt .
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The oxygenated the blood is then pumped into the rest of the body .
To stay healthy and alive we need fresh air with sufficient oxygen
The system won't work without a supply of air .
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From the heart it is pumped to the rest of the body .
Raffles to and from the heart in a loop that begins and ends in different parts of the heart .
