Anatomy
what is the first anatomical structure in the pathway to take air into the body?
the nose
what is the Pleaurae?
A serous membranes that lines the thoracic wall and diaphragm
what is the purpose of the conducting zone?
warms, humidifies, and filters air as it travels to the respiratory zone
True or False: the bronchioles are apart of the conducting zone
False! They are apart of the respiratory zone
what are the bronchioles?
The smallest passageways of the respiratory system that empty into the alveolar ducts
what is the purpose of the respiratory zone?
zone where gas exchange occurs
how many lobes does the right lung have? how many lobes does the left lung have?
right lung: 3 lobes
left lung: 2 lobes
what is bulk flow?
Movement of large amounts of gases to different structures that they can then diffuse into
True or False: CO2 moves into the blood and out of the alveoli
False! CO2 moves OUT of the blood and INTO the alveoli
what is the epiglottis?
a piece of cartilage that blocks the larynx when we swallow food
what is lung capacity?
The amount of air that can be held in your lungs
what is the subdivision of the bronchi?
The bronchi subdivide into lobar (secondary) bronchi, which then subdivide into segmental (tertiary) bronchi, which then eventually divide into bronchioles.
order these correctly:
pharynx, bronchi in lungs, larynx, segmental bronchi, bronchioles, nose, lobar bronchi, nasal cavity, alveolar ducts, alveoli, alveolar sacs
Nose --> Nasal cavity --> pharynx --> larynx --> trachea --> bronchi in lungs --> lobar bronchi --> segmental bronchi --> bronchioles --> alveolar ducts --> alveolar sacs --> alveoli
what are alveoli?
tiny air sacs of the lungs which allow for rapid gaseous exchange
what is the difference between inspiration and expiration?
inspiration: air flows in as muscles contract and the diaphragm lowers
expiration: air pushed out as muscles relax and the diaphragm rises