Your Body's Busy Highway
Did you know your body has a special road map? This map is made of many tiny tubes. These tubes carry blood to every part of you. This whole system is called the circulatory system. It works all day and all night without a break. Your heart is the big boss of this system. It pumps the blood to keep it moving through your whole body.
Blood travels through three main kinds of tubes. The first kind is called an artery. Arteries carry bright red blood away from your heart. This blood is full of oxygen that your body needs to grow. The walls of these tubes are very strong and thick. They can handle the big push of the heart. Most of these tubes are deep inside your body to stay safe.
Next, the blood goes into very small tubes. These tiny tubes are called capillaries. They are so small that you cannot see them without a tool. They reach every little corner of your body. Here, the blood gives food and air to your cells. Then it picks up things the body does not need anymore. This is a very important job for your health.
- Circulatory system:
- The system of the heart and tubes that moves blood through the body.
- Artery:
- A strong tube that carries blood away from the heart to the rest of the body.
- Capillary:
- A very tiny tube where blood gives food and air to the body's cells.
- Vein:
- A tube that carries blood back to the heart.
- Valve:
- A part of a vein that acts like a door to keep blood moving in one direction.
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- 1What is the name of the system that carries blood throughout your body?
- 2According to the text, which organ is the 'big boss' of the circulatory system?
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About this explanatory article passage for 2nd Grade
“Your Body's Busy Highway” is a explanatory article reading passage about Circulatory System, written for 2nd Grade. It takes about 2 minutes to read (323 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.