Respiratory System Flashcards

1
Q

what is the respiratory system comprised of

A

nose, nasal cavity, pharynx, larynx, trachea, and bronchi and their smaller branches, the lungs, and alveoli

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2
Q

what does the nose do?

A

provides an airway to breathe (moistening, warming, and filtering inspired air), serves as resonating chamber for speech and houses the smell receptors

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3
Q

what is the pharynx

A

divided into three regions
nasopharynx- air passageway
oropharynx- air and food passageway
laryngopharynx- air and food passageway

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4
Q

what is the larynx

A

aka voice box, in addition to voice production it helps provide an open (patent) airway and to act as a switching mechanism to route air and food into proper channels via the epiglottis

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5
Q

what is the trachea

A

in the mediastinal region and splits into two bronchi (at the carina) which enter the lungs.

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6
Q

how many lobes does the left lung have

A

two

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7
Q

how many lobes does the right lung have

A

three

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8
Q

what are bronchioles

A

part of smallest branch of bronchial tree, each of the bronchioles narrow further until they end in a tiny pouch called an aveolar sac

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9
Q

what does an aveolar sac do

A

exchanges gases across a single cell layer to tissue into the pulmonary circulation, capillaries from the pulmonary circulation form a bed around each alveoli, this gas is exchanged in a process known as diffusion

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