Respiratory System

Question 1

what is the respiratory system comprised of

Answer 1

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

Question 2

what does the nose do?

Answer 2

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

Question 3

what is the pharynx

Answer 3

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

Question 4

what is the larynx

Answer 4

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

Question 5

what is the trachea

Answer 5

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

Question 6

how many lobes does the left lung have

Answer 6

two

Question 7

how many lobes does the right lung have

Answer 7

three

Question 8

what are bronchioles

Answer 8

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

Question 9

what does an aveolar sac do

Answer 9

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