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RESPIRATORY SYSTEM BASICS Chapter 3 Lesson 3. The Respiratory System  It provides your body’s cells with oxygen and removes carbon dioxide waste.

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Presentation on theme: "RESPIRATORY SYSTEM BASICS Chapter 3 Lesson 3. The Respiratory System  It provides your body’s cells with oxygen and removes carbon dioxide waste."— Presentation transcript:

1 RESPIRATORY SYSTEM BASICS Chapter 3 Lesson 3

2 The Respiratory System  It provides your body’s cells with oxygen and removes carbon dioxide waste.

3 Where it begins  The respiratory process begins in the mouth and nose.  The mouth and nose both use filter systems to clean the air before entering the lungs.  Air is also warmed up before entering the lungs. Air is warmed up so your body temperature stays normal. Cold air = cold body temperature.

4 What comes next?  The air then moves through the throat into the windpipe (trachea)  The trachea is made up of cartilage rings. These rings protect your airway!  cartilage rings line your windpipe.

5 The Human Respiratory System

6 Entering the lungs…  The air enters the lungs through the bronchi.  The bronchi then split into bronchioles.  Bronchioles then split further until become alveoli.  Your lung contains over 150 million alveoli.  Gas exchange (putting oxygen back into the blood) happens at the alveoli.

7 Alveoli

8 The Breathing Process  Inhaling and exhaling are made possible by the diaphragm.  Diaphragm: a thin, dome-shaped muscle that divides the chest from the abdomen.  When you inhale, the diaphragm contracts and drops down, letting air into the lungs.  When you exhale, the diaphragm relaxes and pops up, forcing air out of the lungs.

9 Respiratory Problems  Respiratory Infections: caused by viruses and bacteria. Most common are the flu and colds  Bronchitis: inflammation of the bronchial tubes  Acute Bronchitis: lasts one to two weeks  Chronic Bronchitis: recurs over a person’s lifetime, often getting worse. These people should avoid things that irritate the respiratory system, like smoke and dust.

10 Respiratory Problems Continued…  Asthma: inflammation narrows or blocks bronchial tubes, causing wheezing, shortness of breath and coughing.  Emphysema: A lung disease that involves damage to the alveoli. Most times caused by smoking  Lung Cancer: produces tumors that destroy healthy tissue in the lungs. Mainly caused by smoking or secondhand smoke

11 Without the respiratory system…  Our hearts would not beat.  We would not be able to talk!  The respiratory system allows us to talk. Air passing by organs causes vibrations which creates sound. This sound is our voice.  You could have brain damage. When the brain does not get oxygen, it shuts down.  Your body wouldn’t function.

12 Ways to Care for Your Respiratory System  Exercise Regularly- makes diaphragm and lungs stronger  Avoid polluted air- it can damage tissue in the lungs  Avoid tobacco smoke- it’s a major cause of respiratory disease  Seek medical help for respiratory infections  Sit, stand and walk with correct posture- allows you to breathe easy

13 Respiratory System Facts  Hairs in the nose help to clean the air we breathe as well as warming it.  The highest recorded "sneeze speed" is 165 km per hour.  The surface area of the lungs is roughly the same size as a tennis court.

14 More Facts!  We lose half a liter of water a day through breathing. This is the water vapor we see when we breathe onto glass.  A person at rest usually breathes between 12 and 15 times a minute.  Yawning brings more oxygen into the lungs.


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