The Circulatory system
Which organ pumps blood around your body?
The Heart
Which main organ helps you breathe?
The lungs.
Where does digestion begin?
In the mouth.
What is the control center of the nervous system?
The Brain
The skeleton.
What liquid carries oxygen and nutrients throughout your body?
Blood.
What gas does your body take in from the air when you breathe and what gas does it breathe out as waste?
Oxygen (O2) and Carbon dioxide (CO2).
What liquid in your mouth helps break down food and makes it easier to swallow?
Saliva.
What part of your nervous system is protected by the vertebrae (backbone)?
The spinal cord.
Which bones protect your brain?
The cranium (skull).
What are the tubes that carry blood around your body called?
Blood vessels.
What are the bubble-like air sacs in your lungs where oxygen enters the blood called?
Alveoli.
What tube carries food from your mouth to your stomach?
The esophagus.
What is an automatic, lightning-fast movement, like pulling your hand away from a hot stove that happens before your brain even registers pain?
A reflex.
What is the place where two bones meet called?
A joint.
What are the three main types of blood vessels?
Arteries, veins and capillaries.
What is the large, dome-shaped muscle underneath your lungs that contracts and moves downward to help you inhale?
The diaphragm.
Which organ absorbs most nutrients from digested food?
The small intestine.
What are the specialized cells or "wires" that carry messages back and forth between your brain and the rest of your body?
Nerves (or Neurons).
What connects muscles to the bones?
Tendons.
Why does your heart beat faster when you exercise?
Your muscles need more oxygen and nutrients, so your heart pumps blood faster.
What is the name of the main airway tube that connects your throat to your lungs, and what are the two smaller tubes it splits into?
Put these organs in the correct order that food travels through them: stomach, large intestine, mouth, esophagus, small intestine.
Mouth → esophagus → stomach → small intestine → large intestine.
Which part of the brain controls automatic functions that keep you alive (Ex. Breathing)?
The brain stem (Medulla).
Your skeleton is made of living tissue. What important mineral do your bones store to stay strong, and where inside the bone are new blood cells made?
They store calcium, and blood cells are made in the bone marrow.