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Questions and Answers
What part of the body is the villi found in?
What part of the body is the villi found in?
- Lungs
- Small intestines (correct)
- Cell membrane
- Circulatory system
How do oxygen molecules enter the cells in the body?
How do oxygen molecules enter the cells in the body?
- Through the alveoli
- Through the villi
- Through the cell membrane (correct)
- Through the circulatory system
What is the main function of the alveoli and villi?
What is the main function of the alveoli and villi?
- To provide oxygen to the cells
- To provide food to the cells
- To allow molecules to pass through into the cells (correct)
- To help the other body systems to function properly
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Study Notes
- Oxygen enters the body through the mouth and nose and goes to the lungs.
- Then it goes into the circulatory system and enters the cell.
- Molecules from food and air get to the cells in the body by going through the cell membrane.
- Villi are part of the digestive system. They are tiny finger-like parts that line small intestines.
- The alveoli are part of the respiratory system. They are located at the very end of the branching tubes of the lungs. The alveoli are tiny sacs covered in blood vessels.
- The oxygen molecules can pass through the alveoli into the red blood cells.
- Even though the villi and alveoli are found in different parts of the body, they have similar functions.
- If one of the body systems stops functioning properly, it becomes more difficult for cells to get the molecules they need to function.
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