Heart
Here are some terms you should revise.
Each of these terms comes with a brief explanation.
I have grouped them into different parts of science that you study.
Today we are going to look at the Heart
Your heart is a muscle that pumps blood around your body. It is really two pumps in one place. The heart needs to be strong and throughout your life you should look after your heart. The following 3 things will help you to this:
1. Exercise regularly.
2. Eat a balanced diet.
3. Don't smoke.
LUNGS
We will cover the lungs again, but for now here is a brief recap.
We need air to survive, without air we die.
When we breath air, we are breathing in a mixture of gases. Air contains (amongst other gases): Oxygen, Nitrogen and some Carbon Dioxide.
We breath this air in through our lungs.
Our lungs are able to let the gases in our blood change.
But how does the blood get around?
This is where the heart comes in.
1. Blood coming from the heart to the lungs. This blood has been round the body and is oxygen poor. This blood returns through the veins enters the heart and is pumped to the lungs.
2. At the same time blood coming back from the lungs now oxygen rich, is pumped by the heart through arteries back to the body.
Why do you think it goes to the lungs?
Answer
It goes to the lungs to have the carbon dioxide removed and to be replenished with oxygen.
After changing the carbon dioxide for oxygen, the blood goes back into the heart to be pumped back into the body through the arteries.
All this sounds more complicated than it is
Here is a diagram:
That is about it for now. Here is a table to see what you can remember.
What do the following mean or do?
| Brief description | Extra information | |
| Heart | ||
| Artery | ||
| Vein | ||
| Lungs | ||
| Blood | ||
| Oxygen | ||
| Carbon dioxide | ||
| Pulse | ||
| Air | ||
| Oxygen rich | ||
| Oxygen poor |
Well how did you do?
That wasn't too bad was it?
Next time we will look at the lungs in more detail.
Good look and keep smiling!