The Circulatory System

1/20/2022 10:41:00 PM
Image: livescience.com

Do you know?

  • The circulatory system in the human body stretches 66,000 miles, more than two and a half times the circumference of the Earth.
  • The system's main function is to transport blood, nutrients, gases and hormones to and from the cells throughout the body.

Let's explore more about this system!

Let's learn some new words before you read the passage:

Listen and complete the passage. 

arteries blood vessels stethoscope
transports veins aorta


The circulatory system is an extremely important part of your body. This system blood throughout your body. At any given time, your body has five liters of blood flowing through it. The heart, the lungs, and the all play an active role in blood flow.

Over the course of a person’s life, the heart beats about 3 billion times. That is a lot of very important beats. The beating of the heart means that blood is being sent to the body. The heart is a muscle. It is a very strong muscle. It is divided into four main parts. The blood leaves the heart and enters the . Fresh blood from the aorta goes to the brain.

The brain needs the oxygen in the blood. The brain could not live without this. Blood also travels through the lungs. Carbon dioxide is taken out and oxygen is put in its place. The and veins take the blood to all parts of the body. The blood returns back to the heart through the . You can hear your heart pumping blood in your body by using the stethoscope. One end of this tool is placed on your heart, and the earpieces go in your ears. The works like a mini microphone so that you can hear the heart beating.

Read and answer the following questions.

The Circulatory System

The stethoscope works like a mini microphone. Image: health.economictimes.indiatimes.com

The circulatory system is an extremely important part of your body. This system transports blood throughout your body. At any given time, your body has five liters of blood flowing through it. The heart, the lungs, and the blood vessels all play an active role in blood flow.

Over the course of a person’s life, the heart beats about 3 billion times. That is a lot of very important beats. The beating of the heart means that blood is being sent to the body. The heart is a muscle. It is a very strong muscle. It is divided into four main parts. The blood leaves the heart and enters the aorta. Fresh blood from the aorta goes to the brain.

The brain needs the oxygen in the blood. The brain could not live without this. Blood also travels through the lungs. Carbon dioxide is taken out and oxygen is put in its place. The arteries and veins take the blood to all parts of the body. The blood returns back to the heart through the veins. You can hear your heart pumping blood in your body by using the stethoscope. One end of this tool is placed on your heart, and the earpieces go in your ears. The stethoscope works like a mini microphone so that you can hear the heart beating

Source: Daily Warm-ups Reading Grade 4

How many parts does the heart have?

  • 2
  • 3
  • 4
  • 5

Which of the following is true according to the passage?

  • Blood travels through the lungs first and then travels to other body parts.
  • The stethoscope has the same function as a mini microphone.
  • The oxygen in the blood plays an integral part in the brain's activities.
  • Fresh blood travels to the brain after flowing through the lungs.

What can you infer from the first paragraph?

  • The body needs at most five liters of blood to function normally.
  • All parts of the circulatory system are connected to each other.
  • The circulatory system is the most essential part of the body.
  • There may be problems in blood flow without the lungs' function.

Where is this passage likely to be seen?

  • A biology website
  • A georaphy book
  • A history movie
  • A science poster

Which of the following is NOT true according to the last paragraph?

  • A stethoscope is used to hear the heart beating.
  • Oxygen is replaced by carbon dioxide.
  • The veins help bring blood back to the heart.
  • Blood travels to all parts of the body.

Build your vocabulary by learning these intensive phrases/idioms

My friends invited me to go camping on Saturday, but I have to go to my cousin's wedding instead. _____, after all.

  • Better late than never
  • Blood is thicker than water
  • Don't cry over spilt milk
  • Every cloud has a silver lining

Choose the correct answer.

Films tend to divide two categories: ‘art-house’ and ‘commercial’.

Choose the word(s) OPPOSITE in meaning to the underlined word(s).

My heart skips a beat every time I'm called into my boss's office.

  • I'm calm
  • I'm happy
  • I'm surprised

Rearrange the words in the correct order to make a complete sentence.