21 terms

Chapter 21 Review of Respiratory terms

nasal cavity
posterior to external nose. separated sagitally into right and left sides by the nasal septum where air enters the body through the nostrils or mouth
serves as "floor" of nose and roof of mouth
pharynx (7 openings)
Beginning of throat. There are seven openings into pharynx. Two from nasal cavity, two from middle ear, one from mouth, one from esphoghagus and one from larynx.
end of the pharynx is the larynx. It is our voice box.
Walls of larnyx are made of what?
Cartilaginous structures held together by muscles and ligaments.
Below the larynx is a Cylindrical Tube. held open by cartilaginous rings.
Trachea Branches into two branches are called bronchi...each bronchi leads into the lung. Also supported by rings.
How many internal segments in the lungs?
Each lung will be divided internally into 9 segments. Each segment receives a separate branch of bronchi.
bronchial tubes
Bronichi subdivides into bronchial tubes. They divide into brochioles. Bronchial tubes have rings. Bronchioles will not have rings anymore.
At the end of the bronchioles are the alveioli. They Look like a bunch of grapes on the end. They are Thin walled sacs that are covered in capillaries. Where gas exchanges occurs b/ oxygen and carbon dioxide and it occurs through diffusion in the aveoli.
membrane that lines the Thoracic cavity and covers the lungs. It can get inflamed and can lead to a condition called pleruisy.
What is inspiration?
Filling the lungs with air.
What is expiration?
Forcing air out of the lungs.
tidal volume
The amt of air that can enter and leave the lungs during normal inspiration and expiration during sleep. Its about 500 ml.
inspiratory reserve volume
Normal tidal volume and all the Air that can you forceable take into your lungs. It can get up to 3ooo ml.
expiratory reserve volume
Forcing out as much air as you can in addition to the tidal volume. About 1000 ml.
residual volume
Air that remains in the lungs after you have forced out all the air you can. There will always be some air left in our lungs.
vital capacity
Combined total of your tidal volume, your inspiratory and expiratory reserve volumes. About 4500 ml.
total lung capacity
Total volume or amt of air that your lungs can hold. It's Simply going to be your vital capacity and your reserve volume.
Hemoglobin is The red oxygen carrying pigment of the blood.
as oxygen moves from aveoli to the blood it combines w/ to form oxyhemoglobin. Chemical Bonds B/ oxygen and hemoglobin will be unstable so oxygen can be released for the body cells.