Parts of the Respiratory System

Respiration is the process through which man and animals take in oxygen and give off carbon dioxide and water as waste products.

Respiratory System – made up of different organs that work together in the process of respiration.

Main Parts of the Respiratory System

  1. Nose
  2. Trachea
  3. Bronchial Tubes
  4. Lungs

Other Parts:

  1. Pharynx
  2. Larynx
  3. Alveoli


The Nose

The nose is responsible in smelling something.

It has two openings called nostrils. The air enters the nasal passages through the nostrils. The air that you breathe must be cleaned before reaching the lungs of the person.

Cilia are tiny hairs that is responsible for protecting a person from germs. The cilia filter the smaller particles of dust and dirt.

Mucous membrane is a moist tissue lining in the nose that also catches particles of dirt.  It also warms and moistens the incoming air.   There is also tiny blood vessel that also warm and moisten the passing air  inside the nose.


The Pharynx

The clean air travels from the nasal passages to the pharynx.

The pharynx is located at the back of the throat. 

The pharynx divides into two tubes:

  • Esophagus is the tube that connects the pharynx with the stomach.  It carries food, liquids and saliva from your mouth to the stomach..
  • Trachea or windpipe is a bony tube portion of the respiratory tract that connects the larynx with the bronchial parts of the lungs.   Epiglottis is the flap cartilage located at the bottom of the pharynx.  It opens and closes the trachea.  It prevents the food from going to the trachea by closing it during swallowing.  The epiglottis is open to allow the flow of air in the breathing process most of the time.


The Larynx

From the pharynx, the clean air moves down to the larynx.

The Larynx or voice box is located between the pharynx and the trachea. Humans use the larynx to breathe, talk, and swallow.

The larynx contains the vocal cords that vibrate when air passes through them.


The Trachea or Windpipe

The trachea, or windpipe, is a bony tube portion of the respiratory tract that connects the larynx with the bronchial parts of the lungs that about 13 centimeters long.

The inner wall of the trachea is also lined with cilia.  The cilia catch the dust particles that reach the windpipe.  The dust particles are then pushed out and up toward the throat and mouth for expulsion.  This is why one coughs or sneezes just because of the  dirt gets into the upper respiratory tract.  The lower end of the trachea branches into two large tubes called the bronchi.


The Lungs

The Lungs are  the organs of respiration (in-charge for breathing).  The left bronchus leads to the left lung while the right bronchus leads to the right lung.  Each bronchus divides into smaller tubes called bronchial rami.  The bronchial rami branches off further into smaller tubes called bronchial tubes or bronchioles.  At the ends of these bronchioles are the tiny air sacs called alveoli.

The bronchioles and alveoli look like the branches of a tree.  Bronchi is the biggest branches that are covered by cilia and a thin film of mucus.  Dust and pollen are trapped by the mucus before they reach the alveoli.

Each of the lungs has 300 million alveoli.  Alveolus is surrounded by tiny blood vessels called capillaries. These are the smallest of blood vessels that help to distribute oxygenated blood from the arteries to the tissues and to feed deoxygenated blood from the tissues back to the veins. 

The Respiratory Process

Breathing is the process of respiration, by which air is taken into the lungs and carbon dioxide is pushed out of the lungs.

Breathing in is called inhaling (filling your lungs with air), and breathing out is called exhaling (pushing air with carbon dioxide out of the lungs).  

 The lungs are protected by a set of bones called the rib cage.  The rib cage is the set of bones that encloses the heart and lungs.  Diaphragm is located at the lower portion of the chest, it separates the chest from the abdomen.  Both the rib cage and the diaphragm are important in the breathing process.   When you inhale, the ribs move upward and outward while the diaphragm moves downward.   When you exhale, the opposite happens.  The ribs move downward and inward while the diaphragm moves upward.

85 Responses to Parts of the Respiratory System

  1. KEDLA says:


  2. Naveel says:

    i like it tooooooooooo much

  3. ANCHU ANDREWS says:


  4. gwensebastian E. dela cruz says:

    i like the respiratory system because its good for me and its to be learned

  5. barkha says:

    its a very nice & easy respiratry system . well done . keep it up.

  6. megha says:

    i just love it. thanx a lot far halp i was in need.

  7. megha says:

    i love it thanx for help

  8. trixie says:

    thank you kasi kailangan ko yung definition sa school

  9. gwenth says:

    buti na lang meron dito nagawa ko assignment ko

  10. gwenth says:

    thanks meron na akong ass.

  11. julius says:

    good even the othere seach

  12. ashley says:

    thankz nagawa kona assignment ko!

  13. Roselyn says:

    Thank you this helped me so much

  14. HAYATE says:


  15. dominic says:

    nagawa ko nari ass ko salamat

  16. dominic says:

    nagawa ko narin ass ko

  17. dominic says:

    hahaahahahhaha gigi kids :)

  18. dominic says:

    hi guys musta kayu sorry ha kong fc ako

  19. Jomari says:

    thank you very much… i can finih my homework now..thanks again.!!!

  20. theREALpotterhead says:

    so helpful. thank you so much. now im done:)))

  21. sholantoney says:

    This is good..i love it

  22. yes nagawa ku narin assignment ko sa wakas ilove u sa google pag wala ka wala narin ang assignmet thank u !!!!!!!!!!!!!

  23. weh says:


  24. hina sheikh says:

    this respiratory systm is veryyy helpful fpr me…

  25. bless cervantes says:

    sa akin hidi pa nagawa

  26. salamat nahanap din ang aking sulossyon !!!

  27. elayne po yan says:

    thank you pooooooo!!!!!!!!!
    in sa idea in respiratory

  28. chahiro says:

    tapos ko na din research ko :-) nice one

  29. Jan Lloyd Bautista Macasama says:

    thank you. I made it done researching for our report on Wednesday… I can sleep well now.. :)

  30. bLoCk T@e says:

    heee respiratory system is weak and no wind or air i die because of sex with my girl friend hheheheh

  31. bLoCk T@e says:

    iwill not do it again heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee idie on feb 4 2013 at 11. pm hahahaha weak ang author

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