The Respiratory System 1 Flashcards
-Order of expiration.
What is Cellular Respiration on a cellular level?
Involves the oxidation of glucose.
What is the difference between external and internal respiration?
The exchange of oxygen for carbon dioxide between the air and blood (External) and the blood and body tissues. (Internal)
Where bacteria and disease are trapped and swept by the cilia and mucous.
Pharynx
What is the purpose of the epiglottis when swallowing food?
Prevents food from entering the lungs while swallowing.
Where does air pass after it goes through the epiglottis?
The Glottis, Larynx, and then to the Trachea
What is the Bronchi? What are its purposes?
The trachea branches into two Bronchi. These allow air to travel to each lung.
What is Cilia?
Cilia lines the Bronchi to remove debris and bacteria
What does the Bronchi break out into once it reaches the interior lung?
The Bronchi breaks out into Bronchioles (Smaller tubes) Which go to break out into clusters of Alveoli. (Network of Capillaries)
Alveoli are special lung cells that serve what purpose?
For gas exchange and diffusion (Large surface area) between oxygen rich/poor blood.
What are the inner surfaces of an alveoli lined with? What is its purpose?
Surfactant prevents the sacs from sticking together, reduces surface tension,
What is the function of the diaphragm? Where is it?
It allows for the vacuum effect of air coming in and out of the lungs through expansion and contraction. It is the muscle that separates the abdominal and thoracic cavity.
Where is the intercostal muscle? What is its function?
Found between the ribs, the intercostal muscle can expand and contract to allow the ribs to expand and increase air volume. (Diaphragm)
What is the Pleural Membrane
A sac filled with fluid located in the lungs, which allows for the lungs to expand and contract without friction.
What are the two space cavities in the body? What are they seperated by?
The diaphragm separates the thoracic cavity from the Abdominal cavity, which is just below it.
Explain why air is sucked into the lungs when the diaphragm flexes.
The lungs before they open are deflated, but once the lungs open, air rushes in since gasses move from an area of high concentration (Environment) to an area of low concentration (Lungs)
