True or False: The respiratory system is the body system that takes in oxygen and releases carbon dioxide.
Your body needs ________ and air to create energy.
The body breaks down food and air into ___________.
When we eat food, which body system are we using to break the food down?
Which of the body systems TRANSPORTS molecules from food and air to the cells of the body?
Our metabolism is important because it creates __________ so that we can perform life functions like move, eat, repair and grow.
True or False: Our digestive, circulatory, and respiratory system work together to support our metabolism.
True or False: Cells can only use molecules that are small enough to enter them.
Our body gets glucose molecules from ___________.
True or False: Molecules are smaller than cells.
EXTENDED RESPONSE:
Ezra eats a cheese sandwich for lunch. Cheese contains a lot of protein, and bread is mostly starch. Ezra plans to play basketball later in the afternoon. He is breathing normally.
1. What does Ezra need from the food he ate and the air he breathes so that he can play basketball?
2. How do Ezra’s body systems work together to get the molecules he needs into his cells?
3. How do his cells use these molecules to release energy for his body to run?
EXTENDED RESPONSE:
Lucille is finding it difficult to play soccer after school. Her doctor thinks that her cells might not be getting enough oxygen. When Lucille talked about it with a friend, her friend said there might be a problem with Lucille’s respiratory system or circulatory system.
1. What do Lucille’s cells need in order for her body to function properly?
2. How might a problem with Lucille’s respiratory system or circulatory system make it difficult for Lucille to play soccer?
EXTRA CREDIT: Understanding your metabolism can help you train as an athlete and prepare for athletic competitions. Is this statement true or false? Explain.