respiratory system let’s find out how the body takes in oxygen and keeps us alive!
TRANSCRIPT
Respiration is Breathing• We can only go for a few minutes
without breathing.• Muscles around our lungs help us
breathe because lungs are NOT muscles.
• When we breath in we “inhale”• When we breath out we “exhale”
Breathing through your nose is better than your mouth
• When we breathe through our nose three good things happen to the air we take in:– 1. The air is moistened from the mucus in
our nose– 2. The air is warmed from the mucus in our
nose– 3. The air is cleaned from the small hairs
called cilia in our nose
•Our lungs like moist, warm, clean air!!
Gases we breathe in and out• We inhale the oxygen our bodies need
from the air.• We exhale the carbon dioxide waste our
bodies do not need into the air.• This process is called RESPIRATION!!• The two main organs, the lungs, take in
the oxygenated air.• The diaphragm, a muscle under the
lungs, help this process.
The parts of the Respiratory System
Nose
Mouth
Nasal Cavity
Wind Pipe (Trachea)
Which is better to breathe through? The nose or the mouth?
Throat (pharynx)
More parts of the Respiratory System
Throat (pharynx)
Windpipe (trachea)
Bronchi
Voice box (larynx)
Left Lung
DiaphragmRight Lung
Inside the Lungs
Bronchi
Bronchial Tube
Air sac (Alveoli)
Left Lung
Bronchial Tubes
MAGNIFIEDDIAGRAM:
Right Lung
Respiratory System – Each part has a job!
Nose
Mouth
Nasal Cavity
Wind Pipe (Trachea)
Throat (pharynx)Cleans, moistens and warms the air we breathe.
Can take in air and helps do so when we breathe heavy
Produces mucus
Nasal cavity and mouth meet here
Takes air into lungs, while helping to clean the air as it goes down
More parts of the Respiratory System & their jobs
Windpipe (trachea)
Bronchi
Voice box (larynx)
Lungs
Diaphragm
Throat (pharynx)Nasal cavity and mouth meet here
Takes air into lungs, while helping to clean the air as it goes down
Two branches off the trachea and leading into the lungs
Allows sound to be created when air passes over vocal cords within our voice box
Lightweight organs that take in oxygen
Muscle under lungs that allow us to inhale and exhale
Inside the Lungs
Bronchial Tube
Air sac (Alveoli)
Right Lung
Lightweight, main organ of the system. Do you notice what side it appears to be on in the diagram? Remember that a diagram is a mirror image of your actual body
Two branches off the trachea and leading into the lungs
The tubes inside the lungs leading to the air sacs (alveoli)
The tubes inside the lungs leading to the air sacs (alveoli)
The sacs where all air ends up. Capillaries surround all alveoli. Alveoli have very thin walls so the oxygen can pass through & get into our red blood cells & CO2 can pass out to be exhaled. We have millions of alveoli and they are very small!
Lightweight, main organ of the system
Left Lung
Bronchi
Bronchial Tubes
MAGNIFIEDDIAGRAM:
The Diaphragm is an important muscle
•The Diaphragm is what allows our lungs to take in Oxygen and release Carbon Dioxide.
•Our lungs could not do this on their own since they are not muscles!
The Diaphragm helps us breathe!
• When we breathe out, the diaphragm moves upward, forcing the chest cavity to get smaller and pushing the gases in the lungs up and out of the nose and mouth.
• When we breathe in, the diaphragm moves downward toward the abdomen, enlarging the chest cavity and pulling air in through the nose or mouth.
Imagine your Diaphragm like a smile or a frown
• When you are breathing in oxygen your diaphragm is smiling and bends downward to draw air into the lungs.
Imagine your Diaphragm like a smile or a frown
• When you are breathing out carbon dioxide your diaphragm is frowning and bends upward to push against the lungs and squeeze out the air.
PATH OF AIR THROUGH THE RESPIRATORY SYSTEM
Let’s write it out!
• Nose or Mouth• Past the Pharynx• Past the Larynx• Down the Trachea• Into the Bronchi which take air into the
LUNGS• Into the Bronchial Tubes• Into the Alveoli• Into our Red Blood Cells
What are some things that can damage our Respiratory System?
• Can you think of any?• Smoking- damages your lungs and alveoli. It can
lead to several harmful diseases:– Cancer: Lung, Liver, Mouth, & on & on– Emphysema– Bronchitis
• Pollution- makes the air we breathe less clean and can cause allergies and worsen asthma if you have it.