8th Grade Ch 4 Sec 1 Respiratory System
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Transcript of 8th Grade Ch 4 Sec 1 Respiratory System
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Ch. 4Sec. 1 Respiratory
System
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Discover activity- How big can you blow up a balloon?
Attempt Circumference
1.
2.
3.
Average of 3 attempts
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respiration (cellular respiration)
•process where glucose & oxygen undergo complex series of chemical reactions in cells
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respirationrespiration
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Systems Systems working working togethertogether
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path path of airof air
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Path of airPath of air1. NOSE • lined w/cilia &
mucus- cleans, warms & moistens air
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2. PHARYNX (throat)
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3. TRACHEA (windpipe)•made of cartilage•lined w/cilia & mucus•epiglottis prevents choking
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4. BRONCHI (bronchus)•direct air lungs
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5. LUNGS•main organs of resp. system•bronchi divide into smaller branches (bronchioles)
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6. ALVEOLI (alveolus)•ends of bronchioles•hollow air sacs surrounded by capillaries•large surface area•gas exchange-oxygen & CO2
(& water)
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The Respiratory System [05:11]
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breathing
•movement of air in & out lungs
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How you breathe•diaphragm=
–large, dome-shaped muscle that plays important role in breathing
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•inhale- diaphragm moves–rib muscles contract
•exhale- diaphragm moves –rib muscles relax
Animation of lungs breathing
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How you speak
•larynx (voice box)– @ top of trachea
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vocal cords
• stretch across opening of larynx
• air passes over vocal cords
•vibration creates sound
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Time to test your knowledg
e
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respiration•process where glucose & oxygen
undergo complex series of chemical reactions in cells
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breathing•movement of air in & out lungs
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Which do you inhale when you breathe:
oxygen or carbon dioxide?
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When you inhale you breathe in
oxygen. When you breathe out
you exhale carbon dioxide.
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When you inhale, does your chest expand or
contract?
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When you inhale, your chest expands. The
diaphragm pulls downward.
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Are vocal cords located inside your larynx,
trachea, or esophagus?
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The vocal cords are located inside your larynx.
Hi! I’m Hi! I’m Larry!Larry!
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What substances are exchanged in the alveoli?
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1. oxygen2. carbon dioxide3. water
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Make a diagram of the respiratory system. pg. 115Make a diagram of the respiratory system. pg. 115
Label nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli, Label nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli, lungs & diaphragm.lungs & diaphragm.