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Transcript of Respiratory System
All of your body cells need
The organs of your respiratory system bring oxygen into your body for your
The main organ of the respiratory system are the
To help you breathe, you need the help from a ______________________ called the
At rest, the diaphragm is in an upright position.
When it is pulled down, or when the muscle contracts, the lungs expand.
This causes air (oxygen) to go into the lungs.
Again, when the diaphragm relaxes, air is pushed back out of the lungs.
Path of Oxygen
1. Nose or Mouth
2. Down Windpipe
Called a Trachea
3. Into the bronchioles
4. Into the air sacs
5. Into the bloodstream
6. Distributed throughout body by RBCs
The trachea, also known as the is the tube where oxygen then travels further into the body. It is also lined with cilia.
Remember, the prevents food from going down the trachea!
The is located at the entrance to the trachea.
What happens during breathing?
1. Nose & Mouth
Oxygen first enters body via nose & mouth
* Small nose hairs, called prevent dust and other irritants from entering the body
3. Bronchial & Bronchiole Tubes
The trachea splits into the tubes.
These tubes lead into the left and right lungs.
They continue to further and further.
4. Air Sacs
The air sacs, also called , are lined with
They fill with oxygen during
The oxygen travels through the air sacs and capillaries to reach blood cells in the capillaries.
voice box (larynx)
lung cover (pleura)
Without oxygen, your body cells cannot produce
They also get rid of carbon dioxide, a , given off by the cells.
Releasing carbon dioxide
of the body
It is located below the lungs.
You can not measure your own blood pressure...but... you can measure your heart rate (per minute)!
Pulse: a rhythmical throbbing of the arteries as blood is propelled through them, typically as felt in the wrists or neck.
First, find which pulse is easier for you to locate.
if you count 25 beats, 25 x 4 = 100 beats per minute.
Take this number and multiply by 4 to find your heart rate in beats per minute.
Second, Count the number of beats (pulses) for 15 seconds.
Finding Pulse / Heart Rate
Normal Heart Rate
12 - 16 breaths/per min
At rest, a breathing rate can be...
The best way to measure breathing rate is to count breaths (chest rising) in a full minute!
c. BREATHING RATE CHECKER
b. TIMER & RECORDER
a. RUNNER & PULSE CHECKER
1. Form a group of 3
2. Assign the following roles:
Heart & Breathing Rate Lab