An amazing machine in our body: Let's learn about the Heart and Circulatory System!

Have you ever wondered what that “dig dig… dig dig…” sound is when you put your hand on your chest? Sometimes, after running and playing, this sound gets louder, doesn’t it? Well, that’s the most amazing and indispensable machine in our body, that is, the way our heart works. Without this heart, and the system of veins that connect with it and carry blood throughout the body, we really wouldn’t be able to live even for a single second. So, today, let’s talk about the heart, which is very important to our lives, and the circulatory system. Let me explain it to you in a very simple way, in a way that you can understand.

What is the heart? The most powerful pump in our body!

Simply put, your heart is like a pump made of flesh that works nonstop . It's like a little water motor, but it works so much more amazingly! The average adult's heart beats between 60 and 100 times per minute. It beats a little slower when you're sleeping, and a little faster when you're exercising, that's just the nature of it.

Just imagine, from the day you were born, this little heart has been working for you without any rest, whether you're sleeping or awake! How amazing is that?

With every heartbeat, the heart pumps blood throughout our body. Not just blood, but this blood carries oxygen , which is essential for life. It's like a vehicle that delivers food and drink.

How does the heart work? A little secret!

Okay, now let's see what's going on inside this heart. This is like a little story.

1. First, the heart pumps oxygen-rich blood to every tiny part of our body, called cells (like the tiny building blocks that make up our bodies). These cells absolutely need oxygen to function and live.

2. Once the oxygen has been delivered to the cells, the blood returns to the heart. But now the blood is low in oxygen, and instead contains more waste products from the cells, especially carbon dioxide .

3. Now the heart sends this oxygen-poor, carbon dioxide-rich blood to the lungs to be cleaned. It's like sending it to a laundromat.

4. In the lungs, the carbon dioxide in the blood is removed and replaced with new oxygen. It is this oxygen that we take in when we breathe.

5. Now, clean, oxygenated blood is returning to the heart.

6. Then the heart pumps that blood throughout the body again.

This cycle happens continuously, endlessly. It's like a circle spinning. Imagine what would happen if this stopped for even a second! That's why the heart is one of the most valuable organs in our body.

So what is this circulatory system? The network of pathways that run throughout the body!

Okay, we talked about the heart. Now let's see how the blood pumped by the heart is carried throughout the body. That's what we call the circulatory system . This is like the network of roads in our country. All the major roads, minor roads, and byways come together to form this system. We call these roads blood vessels or blood vessels .

There are two main types of these blood vessels:

• Arteries: These are the large arteries that carry blood away from the heart. These arteries carry the oxygen-rich, clean blood pumped by the heart to all parts of the body. Their walls are slightly thicker because they have to withstand the high pressure of the blood coming from the heart.
• Veins: These are the blood vessels that collect blood from various parts of the body and return it to the heart . This blood is usually low in oxygen and high in carbon dioxide and other waste products.

Another little secret: Capillaries

Between the arteries and veins, there is a network of very fine, tiny blood vessels, no thicker than a strand of hair. These are called capillaries . They are like small side roads leading from the main roads to the houses. Oxygen and nutrients are exchanged between the cells, and waste products are collected from the cells into the blood through these capillaries. This means that this is the most important exchange center.

What service do we get from this system?

The services that the heart and circulatory system provide to us are innumerable. Take a look:

1. Oxygen supply: As we have already said, every cell in our body needs oxygen to live and work. This oxygen is supplied to every cell by this system, as if it were being brought home.

2. Distribution of nutrients: The food we eat gives our bodies energy and growth. Once this food is digested, the nutrients – such as vitamins, proteins, and fats – are carried throughout the body to where they are needed by the blood.

3. Transporting Hormones : Hormones are chemical messengers that control every function in our body. For example, these hormones affect things like how we grow and develop, and how we control our emotions . These hormones are also transported to the necessary parts of the body by the blood.

4. Removing waste: When our cells work, they produce waste products. It's like smoke coming out of a factory. One of the main waste products is carbon dioxide. The blood takes these waste products from the cells and carries them to the organs (like the lungs and kidneys) that remove them from the body.

It's very important that this blood flow is always one-way . It's like a "one-way" road. There are separate paths for blood with oxygen, and separate paths for blood with carbon dioxide. Otherwise, everything could get mixed up and cause a big mess, right?

Should we protect this wonderful system?

Yes, of course! Imagine how much trouble it would be if the water pump and water pipes in your house broke? The same goes for the heart and blood vessels. If these don't work properly, our whole body will be in trouble.

Therefore, it is our responsibility to keep this valuable system healthy.. Simple things like eating a nutritious diet, exercising daily, avoiding bad habits like smoking , and being happy can go a long way in keeping our heart and circulatory system healthy. If you have certain diseases, such as diabetes mellitus or high blood pressure , it is also important to control them well according to medical advice.

Let's simply remember what we talked about today?

Okay, so, here are the most important things you need to remember from what we've talked about today:

• The heart is an amazing machine that pumps blood throughout our bodies, working constantly.
• With each heartbeat, oxygen-rich blood travels throughout the body, then carbon dioxide-rich blood returns to the heart, is cleaned by the lungs, and the journey begins again. This cycle continues.
• The circulatory system is a network of blood vessels (arteries, veins, capillaries) that carry blood from the heart to and from the body.
• This system is where our body's cells receive oxygen, nutrients, and hormones , and removes waste products from the cells.
• This entire system works very neatly, like roads going in the same direction .

So, you've seen how amazing and important this heart and the way blood flows inside our body are. Therefore, being aware of this and trying to keep this system healthy is a great help to yourself. If you have any more questions, you can ask a doctor without fear.