Share Unit 2 Air and the Respiratory System
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What does our body need to survive?
oxygen
The parts of our body that help us to breathe form our ___________.
respiratory system
Why does the brain send signals to the diaphragm and other muscles?
to tell those muscles to tighten and make a person breathe in (inhale)
What is the term for "the brain tells the muscles to relax"?
exhale
What are the different types of gases that air contains?
nitrogen, oxygen, carbon dioxide, water vapour and other gases
What is the process of breathing?
air enters (inhale) and leaves our body (exhale)
What stops dirt and dust from getting into the body?
tiny hairs in the nostrils
What is this part of the body called?
windpipe
What is this part of the body called?
lungs
What are the two main functions of the lungs?
helps the body to take in oxygen and remove carbon dioxide
Fill in the blank: Air travels form the windpipe into two ___________.
breathing / air tubes
What are air sacs surrounded by?
blood vessels
