The Big Three Systems
What system uses organs that act like air pumps to take in fresh air and push out used air?
Respiratory System
What is the strong muscle inside your chest that is about the size of your fist?
Heart
What is the invisible gas in the atmosphere that your lungs inhale and your body needs to live and move?
Oxygen
What liquid does your body produce to cool you off when you get too hot?
Sweat
Which system is made of parts that attach to your bones and pull on them like ropes so your body can sit, walk, and flex?
Muscle System
What is the term for the rhythm or beat you can feel in your wrist or neck every time your heart pumps a wave of blood?
Pulse
What two soft, spongy organs in your chest expand when you inhale and contract when you exhale?
Lungs
What do we call the power your body makes from food to jump, run, and think?
Energy
This system uses your heart like a powerful pump to push blood through tiny tubes in your body.
Circulatory System
What happens to your heart rate after you complete 30 seconds of jumping jacks or marching in place?
Speeds Up/Goes Faster
What living outdoor organisms perform photosynthesis to release oxygen into the atmosphere for humans and animals to breathe?
Plants (Green)
What is the tired or heavy feeling in your muscles when they work hard and use up energy faster than blood can deliver fresh supplies?
Fatigue
How do we get nutrients in our body to use for energy?
Eat and Drink
Why does your heart beat faster when you start moving and exercising?
To send oxygen and blood to muscles quickly
What happens to your ribcage and chest cavity when you inhale?
Expands/Goes Out
What scientific term describes how your body changes (like sweating or slowing breath) to maintain internal stability and return to its comfortable "sweet spot"?
Balance (Homeostasis)
How do all three systems—muscular, respiratory, and circulatory—work together at the exact same time when you move or exercise?
Muscles pull bones to move
Lungs pump in fresh air (oxygen)
Heart pumps blood and oxygen to the muscles
What is the specific term used to describe your heart rate when you are sitting still and reading a book?
What is the scientific term for the number of breaths a person takes in one minute?
Breathing Rate
What happens if a person exercises in the hot sun and cannot sweat or find shade to maintain homeostasis?
No Balance (Overheats)