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22 Cards in this Set

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  • Back
What is the function of the respiratory system?
Air distributor and gas exchanger
What is the route that air travels
Nose, pharynx, larynx,trachea, bronchi, lungs
What are Alveoli?
Very thin-walled sacs at the ends of the "respiratory tree" that are the functional unit of the respiratory system. This is where diffusion takes place.
What is the upper respiratory tract composed of?
Nose, pharynx, and larynx
What is the lower respiratory tract composed of?
Trachea, bronchi, and lungs
What is the difference between the respiratory mucosa and the respiratory membrane?
The mucosa is a membrane that lines most of the air distribution tubes in the system. The membrane seperates the air in the alveoli from the blood in surronding capillaries.
What are the three parts of the pharynx?
The nasopharynx, the oropharynx, and the laryngopharynx
What do most of us call the pharynx?
The throat
What tubes empty into the pharynx?
Auditory or eustachian tubes open into the nasopharynx;they connect the middle ears to the nasopharynx
What is another name for the larynx?
The voice box-it is composed of several pieces of cartilage, the largest of witch is the "adam's apple"
What are the two main parts of the larynx?
The GLOTTIS is the space between the vocal chords. The EPIGLOTTIS partially covers the opening of the larynx. It serves as a trapdoor closing off the larynx during swallowing.
What is the trachea?
It is known as the windpipe-it furnishes part of the open passageway through which air can reach the lungs from the outside
What is the substance that keeps the alveoli open and from collapsing?
Surfactant
What is the pleura?
It covers the outer surface of the lungs and lines the inner surface of the rib cage.
What is external respiration?
The exchange of gases between air in the lungs and in the blood.
What is internal respiration?
The exchange of gases between the blood and the cells of the body.
What is cellular respiration?
It is the actual use of oxygen by cells in the process of metabolism.
What is inspiration?
Moving air into the lungs by means of your inspiratory muscles(diaphragm and external intercostal muscles)..controlled by the phrenic nerve
What is expiration?
Passive process that begins when the internal intercostals and abdominal muscles relax.
What is tidal volume?
It is the volume of a normal breath (avg. 500ml)
What is the vital capacity?
It is the largest amount of air you can breathe out in one expiration (4800ml)
What is the residual volume?
It is what is left in the lung after you empty your vital capacity (1200)