---
title: "The Circulatory System"
description: "Identify and name the main parts of the human circulatory system and describe the functions of the heart, blood vessels, and blood"
canonical: https://lightmysky.com/learn/science/the-circulatory-system-mt_BX4D8cCFtQ
source: https://lightmysky.com/learn/science/the-circulatory-system-mt_BX4D8cCFtQ.md
retrieved: 2026-10-19
---

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# The Circulatory System

Identify and name the main parts of the human circulatory system and describe the functions of the heart, blood vessels, and blood

Subject: Science · Area: Organisms & Life Processes · Ages 10 to 11
Page: https://lightmysky.com/learn/science/the-circulatory-system-mt_BX4D8cCFtQ

## Ready when they can

- Name the main components: heart, arteries, veins, capillaries, blood
- Describe the heart as a pump that pushes blood around the body in a continuous loop
- Explain that blood carries oxygen and nutrients to cells and removes waste products like carbon dioxide

## Lesson: How Your Blood Gets Around

You already know your heart pumps blood in a loop around your body. That blood travels through tubes called blood vessels. There are three kinds: arteries, veins, and capillaries.

*(drawing: Blood loops from the heart, through arteries, into capillaries, back through veins, and home to the heart again.)*

Arteries carry blood away from your heart. Veins carry blood back toward your heart. Capillaries are so small and thin that oxygen and nutrients can pass right through their walls into your cells.

**Example.** When Maya goes for a run, her heart beats faster and pushes more blood into her arteries. That blood carries oxygen to her leg muscles. At the same time, her veins carry blood full of carbon dioxide back toward her heart.

**Tip.** Blood does more than carry oxygen. It also delivers nutrients to your cells and picks up waste like carbon dioxide to carry away. Your heart keeps this loop moving nonstop, day and night.

**Recap.** Blood travels in a loop, out through arteries, across capillaries, back through veins, delivering oxygen and nutrients and carrying away waste.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Heart & Blood Circulation](https://lightmysky.com/learn/science/heart-and-blood-circulation-mt_g_M4Vh_pK7)
- [Skeletons & Muscles](https://lightmysky.com/learn/science/skeletons-and-muscles-mt_g4YSiOCS8g)
- [Organ Systems Vocabulary](https://lightmysky.com/learn/science/organ-systems-vocabulary-mt_K8DJzqbksM)
- [The Digestive System](https://lightmysky.com/learn/science/the-digestive-system-mt_Ruk2-lyGPZ)

## Opens up

- [Diet, Exercise & Lifestyle](https://lightmysky.com/learn/science/diet-exercise-and-lifestyle-mt_2x-EwdBsgl)
- [Heart Structure & Double Circulation](https://lightmysky.com/learn/science/heart-structure-and-double-circulation-mt_TR2oTy9c2M)
- [Nutrient Transport in Animals](https://lightmysky.com/learn/science/nutrient-transport-in-animals-mt_YSyjTZfjvv)