grade 9 [science]

• The group of organs that is responsible for transporting air into the lungs and facilitating the diffusion of oxygen into the bloodstream and breathing out carbon dioxide which is the waste product of cellular respiration.


  What is the Respiratory System?
• Oxygen


  What is the gas that your body needs in order to work and function?
• Carbon Dioxide


  What is the waste product produced through the respiration of people and animals?
• Breathing (Ventilation)


  What is the process of moving air into and out of the lungs?
• External Respiration


  This is the gas exchange between the air from the lungs and blood.
• Internal Respiration


  This is the gas exchange between the blood and tissues.
• Cellular Respiration


  The process in which oxygen is used to produce ATP and carbon dioxide and carbon dioxide as waste.
• Breathing


  It is a mechanical process that helps get air into and out of the lungs.
• Inspiration (Inhalation)


  It is the breathing in of air.
• Expiration (Exhalation)


  It is the breathing out of air.
• Nose/Nasal Cavity, Mouth/Oral Cavity, Pharynx/Throat, Larynx

  What are the Parts of the Upper Respiratory Tract?
• Nose/Nasal Cavity


  This is where oxygen first enters your body.
• Cilia


  These air tiny hairs that help filter, moisten, and heat up the air.
• Nasal Cavity


  Your nose leads into your _______ ________.
• Mouth/Oral Cavity


  Oxygen or air may also enter here but it is not filtered.
• Oral Cavity


  Your mouth opens up into your _______ _______.
• Pharynx/Throat


  It gathers air from your nasal and oral cavities and passes it to your trachea.
• Pharynx/Throat


  This is where the throat divide into the trachea and esophagus.
• Epiglottis


  A flap of tissue that seals off the windpipe and prevents food from entering.
• Larynx


  It is also known as the "voice box" as it is where sound is generated.
• It also help protect the trachea by producing a strong cough reflex if any solid objects pass the epiglottis


  What is the other function of the Larynx besides producing sound?
• Trachea/Windpipe, Bronchi, Lungs, Bronchioles, Alveoli, Capillaries, Diaphragm

  What are the Parts of the Lower Respiratory Tract?
• Trachea/Windpipe


  It is a tube-like pathway that connects your throat to your bronchi tubes and lungs.
• Trachea/Windpipe


  This is were the air passes through when it travels from the pharynx to the bronchi tubes
• 20-25 mm


  What is the diameter of the trachea?
• 10-16 cm


  What is the length of the trachea?
• Cilia


  The inner membrane of the trachea is covered in _______ which catch particles of dust which we can then remove through coughing.
• 15-20


  How many tracheal cartilages (C-shaped rings of cartilage) are there?
• Is to help protect the trachea and keep it open.


  What is the function of the tracheal cartilages (C-shaped rings of cartilage)?
• They are not complete circles due to the position of the esophagus immediately behind the trachea and the need for the trachea to partially collapse to allow the expansion of the esophagus when swallowing large pieces of food.

  Why are the tracheal cartilages (C-shaped rings of cartilage) are not full circles?
• Bronchi


  The trachea divides into two tubes called _______.
• Left Bronchi


  Which bronchi is narrower, longer, and more horizontal?
• Irregular rings of cartilage


  they surround the bronchi, whose walls are also consist of both smooth muscle.
• Tertiary Bronchi


  Inside the lung, the bronchi split in several ways forming _______ _______.
• Lungs


  It is the main organ of the respiratory system.
• Lungs


  They are the site in the body where oxygen is taken into and carbon dioxide is expelled out.
• Right Superior, Right Middle, and Right Inferior


  What are the three lobes of the right lung?
• Left Superior, and Left Inferior

  What are the two lobes of the left lung?
• Tertiary Bronchi


  They give rise to the terminal bronchioles which in turn, give rise to respiratory bronchioles.
• Bronchioles


  They are the smallest subdivisions of bronchi