Circulatory System Cloze Activity Worksheets - Free Printable

I will solve this fill-in-the-blank worksheet on "The Circulatory System" by matching the correct words from the word bank to the blanks in the text. I'll go through the text paragraph by paragraph, using context clues and my knowledge of human biology to select the most appropriate term for each blank.

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First Paragraph:

* Blank 1: The circulatory system is also referred to as the ______ system.
* *Context:* This is a common synonym. The system that moves blood is often called the "cardiovascular" system (from "cardio" meaning heart and "vascular" meaning blood vessels).
* *Answer:* cardiovascular (Word Bank Item #16)

* Blank 2: The circulatory system is made up of the heart, ______, blood and veins.
* *Context:* The sentence lists the components. It mentions "heart," "blood," and "veins." The missing component is "arteries," which are the other major type of blood vessel.
* *Answer:* arteries (Word Bank Item #13)

* Blank 3: The heart... is located on the left side of the ______...
* *Context:* The heart is located within the chest cavity.
* *Answer:* chest (Word Bank Item #15)

* Blank 4: ...and is protected by the ______.
* *Context:* The rib cage protects the heart and lungs.
* *Answer:* ribs (Word Bank Item #8)

* Blank 5: Arteries and veins are also called ______...
* *Context:* Arteries and veins are both types of blood vessels.
* *Answer:* vessels (Word Bank Item #11)

* Blank 6: ...which is appropriate because their main job is to ______ nutrition and water...
* *Context:* The primary function of the circulatory system is to transport substances.
* *Answer:* transport (Word Bank Item #12)

* Blank 7: ...to all of the ______ in your body...
* *Context:* The system delivers nutrients to cells.
* *Answer:* cells (Word Bank Item #9)

* Blank 8: ...and to transport the product away.
* *Context:* After delivering nutrients, it removes waste products.
* *Answer:* waste (Word Bank Item #6)

* Blank 9: Your heart approximately 100,000 times a day...
* *Context:* The heart's action is to beat.
* *Answer:* beats (Word Bank Item #14)

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Second Paragraph:

* Blank 10: When you breathe in, ______ enters your lungs...
* *Context:* Breathing in brings oxygen into the body.
* *Answer:* oxygen (Word Bank Item #5)

* Blank 11: ...Your circulatory system also transports ______ and ______ to cells...
* *Context:* The system transports oxygen and nutrients (like glucose) to cells.
* *Answer for Blank 11:* glucose (Word Bank Item #1)
* *Answer for Blank 12:* nutrients (Word Bank Item #17)

* Blank 13: ...it is helped by your ______ system which breaks the food down...
* *Context:* The digestive system breaks down food into nutrients.
* *Answer:* digestive (Word Bank Item #10)

* Blank 14: ...The blood also transports the waste products through the blood vessels in the form of carbon dioxide which is ______ by your ______.
* *Context:* Carbon dioxide is a waste gas that is exhaled from the lungs.
* *Answer for Blank 14:* exhaled (Word Bank Item #2)
* *Answer for Blank 15:* lungs (Word Bank Item #3)

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Third Paragraph:

* Blank 16: Blood can't travel through your circulatory system without going through your ______.
* *Context:* The heart is the central pump of the circulatory system.
* *Answer:* heart (Word Bank Item #7)

* Blank 17: The blood vessels that transport the blood away from your heart are called the ______.
* *Context:* This is a definition of arteries.
* *Answer:* arteries (Word Bank Item #13 - Note: This is a repeat, but it fits the definition given).

* Blank 18: The blood vessels that transport the blood back to the heart are called ______.
* *Context:* This is a definition of veins.
* *Answer:* veins (Word Bank Item #11 - Note: This is a repeat, but it fits the definition given).

* Blank 19: The vessels that are called arteries, transport the oxygen rich blood which is ______, away from your heart...
* *Context:* Oxygen-rich blood is red.
* *Answer:* red (Word Bank Item #4)

* Blank 20: ...and the vessels that are called veins transport the blood which is ______, blue, back to your heart.
* *Context:* Deoxygenated blood is often described as blue or bluish, though it's actually dark red.
* *Answer:* blue (Word Bank Item #18 - Note: This is a common simplification for educational purposes).

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Based on the analysis above, here is the completed text with the correct words filled in:

The circulatory system is also referred to as the cardiovascular system. The circulatory system is made up of the heart, arteries, blood and veins. The heart which is only the size of a fist is located on the left side of the chest and is protected by the ribs. Arteries and veins are also called vessels which is appropriate because their main job is to transport nutrition and water to all of the cells in your body and to transport the product away. Your heart approximately 100,000 times a day to help your nutrient rich blood travel to all the parts of your body. When you breathe in, oxygen enters your lungs and your blood vessels take the oxygen and transport it to your cells. Your circulatory system also transports glucose and nutrients to cells and organs throughout your body, it is helped by your digestive system which breaks the food down into nutrients and glucose ready to be transported. The blood also transports the waste products through the blood vessels in the form of carbon dioxide which is exhaled by your lungs. Blood can't travel through your circulatory system without going through your heart. The blood vessels that transport the blood away from your heart are called the arteries. The blood vessels that transport the blood back to the heart are called veins. The vessels that are called arteries, transport the oxygen rich blood which is red, away from your heart to other parts of your body and the vessels that are called veins transport the blood which is blue, back to your heart.