1. The Respiratory System
JH-KEADLE
The Respiratory System

2. Functions
The respiratory system moves oxygen from the outside environment into the body.
It also removes carbon dioxide and water from the body.

3. Organs Air travels in and out of the organs of the respiratory system;
nose
pharynx
larynx
trachea
bronchi
lungs
bronchioles
alveoli

5. vocabulary
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respiration – the transport of oxygen from outside the body to cells and tissues, and the transport of carbon dioxide and wastes away from cells and to the environment.

6. Why do we Breathe?
vocabulary
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cellular respiration - (break down of glucose for energy) requires oxygen as a reactant.
Respiration also produces water and carbon dioxide which can leave the body through the lungs

7. The Air You Breathe The air you breathe comes from the atmosphere
21% oxygen
78% nitrogen
1% other gases
Your body does not use most of the air you inhale
What you don’t need is exhaled

8. The Path of Air
As air moves the organs, it is warmed, moistened, and bacteria and other small particles are removed.

9. In the nose … Air is warmed
Nose hair filters dust and other small things out.
Mucus also traps small particles, dust, and bacteria.

11. the pharynx
vocabulary
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pharynx - (throat) is a long hollow tube that connects the nose to the trachea.

12. the larynx
vocabulary
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larynx – part of the throat where the vocal cords are located.

13. the trachea
vocabulary
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trachea - connects the pharynx to the bronchi. It is lined with mucus and small hairs that trap particles.
You can feel the ridges of the trachea by running your finger down your neck

14. bronchi bronchi - passages that direct air into the lungs.
vocabulary
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bronchi - passages that direct air into the lungs.
Left bronchus goes to the left lung
Right bronchus goes into the right lung

15. the lungs
vocabulary
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lungs - The main organs of the respiratory system that provide oxygen to the body.
The bronchi, bronchioles, and alveoli are all inside the lungs.

17. bronchioles
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bronchioles - smaller branches that come off of the bronchi.

18. alveoli
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alveoli - smallest structure in the lungs where gas exchange takes place between the lungs and the blood.
The walls of the alveoli are very thin which allows the gases to diffuse back and forth.

20. Gas Exchange
After air enters the alveoli, oxygen passes through the wall of the alveoli, into the capillary that surrounds it , then into the artery headed to the heart.
At the same time, carbon dioxide and water pass from the vein into the capillary, then into the alveoli where they are exhaled.

21. Gas Exchange
alveoli

22. diaphragm – dome-shaped muscle below the lungs that causes us to inhale and exhale.
vocabulary
word!

23. How You Breathe You breathe on average 20,000 times a day
Breathing speeds up when you exercise
Breathing slows down when you are asleep
Both involuntary and voluntary muscles and nervous system helps you breathe

24. Speaking Inside your trachea are vocal cords
Vocal cords stretch across the opening
Your vocal cords work like the neck of a balloon when it is stretched
Air passes over the vocal cords, making them vibrate which produces sound
Low – vocal cords contract & shorten
High – vocal cords relax & lengthen

25. Body systems that work with the respiratory system;
muscular system to pull air into the lungs
circulatory system to carry the oxygen in and carbon dioxide out
digestive system to provide energy