Let’s go through each question one by one, using the passage to find the answers.
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Question 1: What is the function of the white blood cells?
From the passage:
> “White blood cells are important because they help to fight disease.”
So, their job is to protect your body from sickness — like germs or infections.
✔ Final Answer for Q1: White blood cells help fight disease.
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Question 2: How are arteries and veins alike?
From the passage:
> “Arteries and veins are the body’s largest blood vessels...”
Also, both carry blood — arteries carry it away from the heart, veins bring it back. But the question asks how they’re *alike*, so we focus on what they share.
They’re both large blood vessels that move blood around the body.
✔ Final Answer for Q2: Arteries and veins are alike because they are both large blood vessels that carry blood throughout the body.
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Question 3: Based on other information in the passage, what gases are being exchanged in the alveoli?
From the passage:
> “The tiny air sacs in your lungs called alveoli... On a microscope, alveoli look like grape clusters... The walls of the alveoli are very thin, so oxygen can pass into the bloodstream easily.”
And earlier:
> “Your body uses this oxygen to make energy and gets rid of carbon dioxide as waste.”
So, when you breathe in, oxygen goes into your blood in the alveoli. When you breathe out, carbon dioxide (a waste gas) leaves your blood and goes into the alveoli to be exhaled.
✔ Final Answer for Q3: Oxygen and carbon dioxide are the gases being exchanged in the alveoli.
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Question 4: What is the main idea of this passage?
The whole passage talks about how blood moves through your body — the heart pumps it, blood vessels carry it, different parts of blood do different jobs (like carrying oxygen or fighting disease), and how everything works together to keep you alive.
It starts with:
> “The circulatory system is the transport system of the human body.”
That’s the big picture.
✔ Final Answer for Q4: The main idea is that the circulatory system transports blood throughout the body to deliver oxygen and nutrients and remove waste.
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Question 5: What does hemoglobin do?
From the passage:
> “Hemoglobin allows blood to hold on to more oxygen than it could otherwise.”
Also:
> “Hemoglobin is found in red blood cells only.”
So, hemoglobin helps red blood cells carry more oxygen.
✔ Final Answer for Q5: Hemoglobin helps red blood cells carry more oxygen.
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Final Answer:
1) White blood cells help fight disease.
2) Arteries and veins are alike because they are both large blood vessels that carry blood throughout the body.
3) Oxygen and carbon dioxide are the gases being exchanged in the alveoli.
4) The main idea is that the circulatory system transports blood throughout the body to deliver oxygen and nutrients and remove waste.
5) Hemoglobin helps red blood cells carry more oxygen.
Parent Tip: Review the logic above to help your child master the concept of 6th grade reading comprehension worksheet with answers.
