5th Grade-Ch. 3 Lesson 2 What is the Respiratory System
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Transcript of 5th Grade-Ch. 3 Lesson 2 What is the Respiratory System
Ch. 3Lesson 2
What is the respiratory system?
Name of student
Diameter of ring
(cm)
Lung capacity (L)
Your name
Activity-pg. 80 What is your lung capacity?
Lung Capacity Activity• Question-How much air can I breathe in or
blow out?• Purpose: To determine how much air different
people can hold in their lungs• Hypothesis: If I blow a bubble as large as I
can, then the volume of air in the bubblewill be the same as the volume of airthat was in my lungs.
• Materials: black trash bag, bubble solution, plastic straw, metric ruler, masking tape
• Procedure: on pgs. 80-81 in science book
• Conclusion: I breathed out _______ of air. Compared to other students at my table, I breathed out (more or less) air.
respiratory system:• Carries gases between outside air & blood
• Many parts coated w/ mucus=
sticky, thick fluid that traps
dust, germs & other things in air
trachea• tube that carries air from larynx lungs
• leads to 2 branches (bronchi) goes in lungs
bronchioles•small tubes in lungs
larynx• vocal cords stretch across larynx
• voice= vocal cords vibrate
air sacs (alveoli)• thin walled pouches in lungs
• oxygen enters blood & carbon dioxide leaves thru. capillaries
capillary
diaphragm• dome shaped muscle that forms bottom of chest
• inhale (breathe in)- moves
• exhale (breathe out)- moves
cilia• Tiny, hairlike structures on cells in linings
of many parts of respiratory system
Scanning electron microscope image of lung cilia
nose
mouth
larynx
pharynx
trachea
lungs
bronchi
bronchioles
alveoli (air sacs)diaphragm
When you When you hold your hold your
breath, carbon breath, carbon dioxide builds dioxide builds in your blood. in your blood.
Your brain Your brain senses this & senses this &
sends a sends a message to message to
the diaphragm the diaphragm and rib and rib
muscles muscles telling them to telling them to
breathe.breathe.
Respiratory System
Are vocal cords located inside your larynx,
trachea, or esophagus?
The vocal cords are located inside your larynx.
When you inhale, which direction does
your diaphragm move?
The diaphragm pulls downward.
nose
mouth
larynx
pharynx
trachea
lungs
bronchi
bronchioles
alveoli (air sacs)
diaphragm
cilia• Tiny, hairlike structures on cells in linings
of many parts of respiratory system
trachea• Tube that carries air from larynx lungs
• Leads to 2 branches (bronchi) lungs
bronchioles
• Small tubes in lungs
exhale
breathe out
respiratory system:• Carries gases between outside air & blood
• Many parts coated w/ _________
sticky, thick fluid that traps
dust, germs & other things in air
mucus
diaphragm• dome shaped muscle that forms bottom of chest
inhale
breathe in