Respiratory System I Animated I Grade 9 - Q1 l PART 1

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PART 2: Circulatory System -    • Respiratory System I Animated  I  Gra...  

Respiratory system is made up of organs in the body that help us to breathe. The main job of respiratory system is to move fresh air which is the oxygen into our body and remove waste gas which is the carbon dioxide

PARTS OF RESPIRATORY SYSTEM
1. Nasal Cavity
2. Pharynx
3. Larynx
4. Trachea
5. Bronchi
6. Lungs.

NASAL CAVITY
The nose is what we normally use to inhale and exhale. Its two holes are called nostrils and the skin lining inside has tiny hairs called cilia which filter the dust and other particles in the air when we breath.
The mouth on the other hand, is what we use to breathe when we can’t breathe through our nose.

PHARYNX
The pharynx is the opening behind the nose and mouth and is part of both the respiratory and digestive systems. Both food and air pass through the pharynx. The pharynx ends in the esophagus and the larynx.

LARYNX
The larynx is also known as the "voice box" because it contains the vocal cords and the different muscles used in producing sounds. The epiglottis, a cartilage found at the top of the larynx prevents food and water from entering the windpipe and the lungs.

TRACHEA
The trachea is also referred to as the windpipe. It is a tube that carries air in and out of our lungs. The end of the trachea is split into two tubes called the bronchi.

BRONCHI
Bronchi are the main airways into the lungs. They also have several thin-walled branches called bronchioles. These bronchioles lead to air sacs called alveoli, where most of the gas exchange happens.

LUNGS
The lungs are the main organ for respiration. They consist of a cluster of bronchioles and alveoli, blood vessels, and elastic tissue. Their main function is to transfer oxygen into the bloodstream, and to excrete carbon dioxide into the air. In short, this is where the oxygen is exchanged for carbon dioxide.

INHALATION
Inhalation is the process breathing in.

EXHALATION
Exhalation is the process of breathing out.


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REFERENCE: Lejano, H. (2020). Science 9 Learner's Module. First Edition. Department of Education – National Capital Region. Misamis St. Bago Bantay, Quezon City





























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