RESPIRATORY
SYSTEM
SYSTEM
What is the main job of the respiratory system?
To bring in oxygen and remove carbon dioxide
What is the main job of the digestive system?
To break down food and absorb nutrients
What two main parts make up this system?
Muscles and bones
What is the main job of the circulatory system?
To move blood around the body
What kind of breathing organ do fish use?
Gills
What tube carries air from the throat to the lungs?
Trachea
Where does digestion start?
In the mouth
What do bones do for the body?
Support and protect organs
What organ pumps blood?
The heart
How do frogs breathe besides using lungs?
Through their skin
Where does oxygen and carbon dioxide exchange happen?
In the alveoli
What does the stomach use to break down food?
Acids and enzymes
What connects muscles to bones?
Tendons
How many chambers does the heart have?
Four
What do bees use to let air into their bodies?
Spiracles
What muscle helps move air in and out of the lungs?
Diaphragm
Which organ absorbs nutrients into the bloodstream?
Small intestine
What happens when a muscle contracts?
It gets shorter and pulls on the bone
What do arteries carry?
Oxygen-rich blood away from the heart
What is special about a cow’s stomach?
It has four compartments
What happens to oxygen after it reaches the alveoli?
It moves into the blood
What does the liver produce to help digest fats?
Bile
What do ribs protect?
The heart and lungs
Where does blood pick up oxygen?
In the lungs
What do octopuses use to crush food?
A beak (and radula)