Term
| label heart diagram [image] |
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Definition
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Term
| label respiratory system diagram [image] |
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Definition
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Term
| label digestive system diagram[image] |
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Definition
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Term
| What happens when you breathe? |
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Definition
| When you breathe in it fills your lungs with oxygen and when you breathe out you get rid of the carbon dioxide in your body. |
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Term
| What is the purpose of the circulatory system? |
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Definition
| The circulatory system transports food and oxygen throughout your body and circulates blood containing nutrients. |
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Term
| What structures connect arteries and veins? |
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Definition
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Term
| Which vessels transport blood away from the heart and have a thick muscular wall? |
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Definition
| Arteries have thick, muscular walls for carrying blood under pressure away from the heart. |
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Term
| Which vessels transport blood toward the heart and have valves? |
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Definition
| Veins have thinner walls than arteries. Valves inside veins prevent blood from flowing backward. They take the blood back to the heart. |
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Term
| Which part of the heart receives blood from the lungs? |
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Definition
| The left side of the heart receives the oxygen-rich blood from the lungs and pumps it to the body. |
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Term
| Why is the circulatory system important to humans? |
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Definition
| This system circulates blood around the body, delivering food particles, dissolved gases, and other materials to every cell and carrying away cell wastes. It keeps us alive. |
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Term
| Which structures are included in the circulatory system? |
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Definition
| The circulatory system consists of the heart, blood, and blood vessels |
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Term
| Why are capillaries small and thin? |
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Definition
| The function of capillaries is to allow food and oxygen to diffuse to cells while waste is diffused from cells. Capillaries have thin walls - only one cell thick - that allow them to effectively perform their function. |
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Term
| Why does the heart need so many different parts? |
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Definition
| It needs to pump blood all over the body. It has a very important job that needs parts all over our bodies. |
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Term
| List the tubes that help you to breathe and their diameter in the chart below: |
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Definition
trachea 20mm
bronchus 12mm
Alveoli 0.2mm |
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Term
| What are the tiny air sacs at the end of the tubes called? |
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Definition
| The tiny air sacs at the end of the tubes are called alveoli |
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Term
| What are the tiniest tubes in the circulatory system called? |
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Definition
| The smallest blood vessels are the capillaries. |
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Term
| How are these tiny tubes related to the air sacs? |
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Definition
| The tiny tubes are related to the air sacs because each alveolus is surrounded by a web of capillaries. |
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Term
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Definition
| The oxygen diffuses through the walls of the alveoli and through the capillary so it can get into the bloodstream to keep use healthy and alive. |
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Term
| What is exchanged from the blood in the capillaries and the air in the air sacs? |
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Definition
| Carbon dioxide and oxygen |
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Term
| Name two functions of your blood stream. |
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Definition
| Carries food particles and obtains oxygen that comes from our lungs. |
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Term
| Where does the transfer of food from the digestive system to your circulatory system take place? |
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Definition
| This transfer takes place in the inner lining of the small intestine. |
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Term
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Definition
| Digestion is the process in which food is broken down to become useful to the body. |
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Term
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Definition
| The process that allows food particles to pass from the intestine to the circulatory system |
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Term
| Name two functions of the digestive system? |
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Definition
| To break down food to use the useful cells and give away the unuseful cells and to help absorption take place. |
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Term
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Definition
| Villi are finger-like projections on the surface on the inner lining of the small intestine. Villi contain multiple networks of capillaries. |
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Term
| Why are there so many villi and air sacs? |
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Definition
| They increase the surface area so absorption of nutrients can happen more efficiently. |
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