Muscles
What type of muscles do your lungs have?
They do not have any.
When you breathe out, you are _______________.
The soft, spongy organs used for breathing are called ________________
The lungs
How much of the air that we breathe in is actually oxygen?
One-fifth
What types of blood cells carry oxygen?
Red blood cells
What are the two major muscles that allow the lungs to inflate and deflate?
Contract
A group of cells working together are referred to as __________________
Tissue
What does your nose do the air you breathe in?
It warms, moistens, and cleans the air.
True or False:
The body only use energy during physical exertion such as exercise.
When your muscles are tired, why do they feel better as you rest?
The muscle cells get more oxygen and nutrients from your blood and more energy is released.
Something that is not needed by the body is called _______________.
Waste
The windpipe is also known as the _______________.
trachea
What is the purpose of the respiratory system?
It brings air containing oxygen into your body.
What is the difference between veins and arteries?
Veins carry blood to your heart and arteries carry blood away from your heart.
Why do muscles get so tired during physical activity?
Sometimes you use your muscles so much which results in not energy being released from nutrients.
The two tubes that lead from the trachea to the lungs are called ______________.
Bronchial Tubes
A tiny blood vessel with thin walls through which oxygen, nutrients, and wastes pass is called a ________________.
Capillary
Where does the exchange of carbon dioxide and oxygen take place?
The air sacs
What does the respiratory system change food into?
Nutrients
The large muscle below the lungs that helps you breathe is called ________________.
The diaphragm.
The group of organs that take oxygen from the air and remove carbon dioxide from the body is called the _________________.
Respiratory System
What carries blood to your heart?
Veins
What are the three parts of the respiratory system?
Your nose, lungs, and the tubes that connect them.
The watery part of the blood is called ______________
Plasma