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Question Video: Identifying Parts of the Circulatory System Science • 4th Grade

Which of the following is not part of the circulatory system? [A] The heart [B] Veins [C] Arteries [D] The lungs

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Video Transcript

Which of the following is not part of the circulatory system? Is it the heart, veins, arteries, or the lungs?

In order to answer this question, we have to make sure we understand what this circulatory system is. The circulatory system is an organ system in the body. An organ system is when a group of organs work together to do a particular job. The job of the circulatory system is to pump blood around our body. There are many organ systems in our body. These include the nervous system, which enables us to think and feel; the digestive system, which enables us to digest our food; and the respiratory system, which enables us to breathe.

Now, as you can see from the diagrams, each organ system has a different group of organs working together to do a particular job. Within the circulatory system, you have the heart, arteries, and veins.

So, to return to our question, “Which of the following is not part of the circulatory system?,” well we can see that the circulatory system consists of the heart, which is answer (A). It also has arteries, which is answer (C). And it has veins, which is answer (B), which means the answer to “Which of the following is not part of the circulatory system?” must be the lungs.

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