1.4 Human Respiratory System Flashcards
What is included in the conduction zone?
- nose
- pharynx
- larynx
- trachea
- bronchi
- bronchioles
what is the function of the conduction zone?
a passageway of air that enters and leaves the lungs
the conduction zone if a continuous structure, true or false?
true
what lines the system of tubules?
a ciliated mucus-secreting epithelium
what is the lining of the system of tubules for?
it traps and removes dust particles and pathogens in inhaled air before it reaches the respiration zone
where does gas exchange take place?
in the respiration zone
what does the nasal cavity do?
it moistens and warms the air entering the nostrils
why are nostrils bordered by hair?
it trap and filters particles out of the system
if the mouth enters through the mouth, where does it enter?
the pharynx
it is the intersection where food and air meets
pharynx
what is the trachea?
- the wind pipe
- it lies in front of the esophagus
- it extends into the thorax
what lines the walls of the trachea?
ciliated epithelium
what strengthens and prevents the trachea from collapsing?
C-shaped bands of cartilage
where is the larynx located?
between the glottis and upper end of trachea
what is the purpose of the larynx?
it serves as an instrument for vocal communication
how does the larynx move when you swallow food?
- larynx moves upward
- the epiglottis tips over the glottis
what is the opening of the trachea?
glottis
why does the larynx move upward when you swallow food?
it prevents food from going into trachea and into the esophagus
why does the glottis remain open when not swallowing?
to ensure continuous breathing
what supports the bronchi?
cartilage bands
the bronchi progressively divides into smaller branches called ____
bronchioles
cartilage is ____ as bronchioles ______ in diameter
lost; decrease
these are internal sac-like organs
lungs
how do lungs connect to the outside air?
through the tubular passageway
