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