Circulatory System Cloze Worksheet - Free Printable
Educational worksheet: Circulatory System Cloze Worksheet. Download and print for classroom or home learning activities.
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Step-by-step solution for: Circulatory System Cloze Worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Circulatory System Cloze Worksheet
Here is the completed worksheet with all blanks filled in correctly, followed by a detailed explanation of each answer.
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✔ Completed Worksheet:
The Circulatory System
Use the words in the box to fill in the blanks.
*(Word Box: veins, arteries, capillaries, transport, oxygen, nutrients, energy, heat, circulatory, lungs, blood, heart, pumped, carbon dioxide, bright, intestinal, atmosphere)*
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All animals need to transport materials around to the different parts of the body. This is the job of the circulatory system. The circulatory system consists of a liquid called blood, a pump called the heart, and a series of vessels called arteries and veins.
One thing that must be transported around is a gas called oxygen. Oxygen enters the body through the lungs. It is then pumped through the heart and around the body where it is used along with food to make energy. The body produces another gas called carbon dioxide which is carried back to the heart and then to the lungs where it is released back into the atmosphere.
The vessels that transport blood bright red because it is rich in oxygen. The blood in arteries is bright red because it is rich in oxygen. The vessels that transport blood dark red because it is low in oxygen. The blood in veins is dark red because it is low in oxygen. Capillaries are small vessels that join the arteries and veins.
Nutrients from food are also transported around the body by the circulatory system. They enter the body from the small intestine. The circulatory system also helps to regulate temperature by transporting heat around the body.
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📌 Explanation of Each Answer:
1. transport — All animals need to *move* or *transport* substances (like oxygen, nutrients, waste) throughout their bodies for survival.
2. circulatory — The system responsible for moving blood and other substances is called the *circulatory system*.
3. blood — The fluid that carries oxygen, nutrients, hormones, and waste products; it’s the “liquid” component of the system.
4. heart — The muscular organ that acts as a *pump*, pushing blood through the body.
5. arteries and veins — These are the two main types of blood vessels. *Arteries* carry blood away from the heart; *veins* carry blood back to the heart.
6. oxygen — A vital gas needed for cellular respiration and energy production.
7. lungs — Where gas exchange occurs: oxygen enters the bloodstream, and carbon dioxide leaves.
8. pumped — The heart *pumps* oxygen-rich blood out to the body.
9. energy — Oxygen and glucose (from food) combine in cells to produce *energy* via cellular respiration.
10. carbon dioxide — A waste gas produced during cellular respiration that must be removed from the body.
11. atmosphere — Carbon dioxide is expelled from the lungs into the surrounding air (*atmosphere*).
12. bright — Arterial blood is *bright red* due to high oxygen content bound to hemoglobin.
13. bright — Repeats the previous point — arterial blood is *bright red*.
14. dark — Venous blood is *dark red* (sometimes described as maroon) because it has low oxygen levels.
15. dark — Again, venous blood is *dark red* due to low oxygen.
16. capillaries — Tiny vessels connecting arteries and veins where exchange of gases, nutrients, and wastes occurs.
17. nutrients — Food broken down in digestion becomes *nutrients* absorbed into the bloodstream.
18. intestine — Specifically, the *small intestine* is where most nutrient absorption occurs into the blood.
19. heat — Blood helps distribute *heat* to maintain body temperature — e.g., warming extremities or releasing heat through skin.
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✔ Final Notes:
- The word "bright" appears twice — once describing the color of oxygen-rich blood in arteries, and again to reinforce that arterial blood is bright red.
- The word "dark" appears twice — describing deoxygenated blood in veins.
- The term “intestinal” is used only once — referring to the *small intestine* as the site of nutrient absorption.
- The circulatory system’s functions include: transporting oxygen, nutrients, waste, regulating temperature, and maintaining homeostasis.
This worksheet effectively teaches the basic components and functions of the human circulatory system using key vocabulary.
Let me know if you’d like a diagram or flashcards based on this!
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✔ Completed Worksheet:
The Circulatory System
Use the words in the box to fill in the blanks.
*(Word Box: veins, arteries, capillaries, transport, oxygen, nutrients, energy, heat, circulatory, lungs, blood, heart, pumped, carbon dioxide, bright, intestinal, atmosphere)*
---
All animals need to transport materials around to the different parts of the body. This is the job of the circulatory system. The circulatory system consists of a liquid called blood, a pump called the heart, and a series of vessels called arteries and veins.
One thing that must be transported around is a gas called oxygen. Oxygen enters the body through the lungs. It is then pumped through the heart and around the body where it is used along with food to make energy. The body produces another gas called carbon dioxide which is carried back to the heart and then to the lungs where it is released back into the atmosphere.
The vessels that transport blood bright red because it is rich in oxygen. The blood in arteries is bright red because it is rich in oxygen. The vessels that transport blood dark red because it is low in oxygen. The blood in veins is dark red because it is low in oxygen. Capillaries are small vessels that join the arteries and veins.
Nutrients from food are also transported around the body by the circulatory system. They enter the body from the small intestine. The circulatory system also helps to regulate temperature by transporting heat around the body.
---
📌 Explanation of Each Answer:
1. transport — All animals need to *move* or *transport* substances (like oxygen, nutrients, waste) throughout their bodies for survival.
2. circulatory — The system responsible for moving blood and other substances is called the *circulatory system*.
3. blood — The fluid that carries oxygen, nutrients, hormones, and waste products; it’s the “liquid” component of the system.
4. heart — The muscular organ that acts as a *pump*, pushing blood through the body.
5. arteries and veins — These are the two main types of blood vessels. *Arteries* carry blood away from the heart; *veins* carry blood back to the heart.
6. oxygen — A vital gas needed for cellular respiration and energy production.
7. lungs — Where gas exchange occurs: oxygen enters the bloodstream, and carbon dioxide leaves.
8. pumped — The heart *pumps* oxygen-rich blood out to the body.
9. energy — Oxygen and glucose (from food) combine in cells to produce *energy* via cellular respiration.
10. carbon dioxide — A waste gas produced during cellular respiration that must be removed from the body.
11. atmosphere — Carbon dioxide is expelled from the lungs into the surrounding air (*atmosphere*).
12. bright — Arterial blood is *bright red* due to high oxygen content bound to hemoglobin.
13. bright — Repeats the previous point — arterial blood is *bright red*.
14. dark — Venous blood is *dark red* (sometimes described as maroon) because it has low oxygen levels.
15. dark — Again, venous blood is *dark red* due to low oxygen.
16. capillaries — Tiny vessels connecting arteries and veins where exchange of gases, nutrients, and wastes occurs.
17. nutrients — Food broken down in digestion becomes *nutrients* absorbed into the bloodstream.
18. intestine — Specifically, the *small intestine* is where most nutrient absorption occurs into the blood.
19. heat — Blood helps distribute *heat* to maintain body temperature — e.g., warming extremities or releasing heat through skin.
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✔ Final Notes:
- The word "bright" appears twice — once describing the color of oxygen-rich blood in arteries, and again to reinforce that arterial blood is bright red.
- The word "dark" appears twice — describing deoxygenated blood in veins.
- The term “intestinal” is used only once — referring to the *small intestine* as the site of nutrient absorption.
- The circulatory system’s functions include: transporting oxygen, nutrients, waste, regulating temperature, and maintaining homeostasis.
This worksheet effectively teaches the basic components and functions of the human circulatory system using key vocabulary.
Let me know if you’d like a diagram or flashcards based on this!
Parent Tip: Review the logic above to help your child master the concept of circulatory system worksheet.
