Lab Exam 3: Respiratory, Digestive, And
Urinary Systems Questions And
Answers| 2026 Update
conducting zone - Ans--nose to terminal bronchioles
nares - Ans--nostrils
nasal cavity - Ans--hollow space behind the nose
oral cavity - Ans--mouth
Pharynx - Ans--throat
nasopharynx - Ans--region of the pharynx at the back of the nose and above
the soft palate
oropharynx - Ans--central portion of the pharynx between the roof of the
mouth and the upper edge of the epiglottis
laryngopharynx - Ans--lower part of the pharynx, just below the
oropharyngeal opening into the larynx and esophagus
glottis - Ans--Opening between vocal cords
Epiglottis - Ans--A flap of tissue that seals off the windpipe and prevents
food from entering.
Larynx - Ans--voice box
thyroid cartilage - Ans--Adam's apple
, hyoid bone - Ans--a U-shaped bone in the neck that supports the tongue.
Trachea - Ans--windpipe
carina - Ans--Point at which the trachea bifurcates (divides) into the left and
right mainstem bronchi.
bronchial tree - Ans--branched airways that lead from the trachea to the
microscopic air sacs called alveoli
primary bronchi - Ans--The first branches of the trachea. There are two
primary bronchi, one for each lung.
secondary bronchi - Ans--The primary bronchi split into these smaller tubes
within the lungs
Bronchioles - Ans--smallest branches of the bronchi
respiratory zone - Ans--site of gas exchange, respiratory bronchioles,
alveolar ducts, alveoli
terminal bronchioles - Ans--smaller than 0.5 millimeter and these mark the
end of the conducting zone
alveolar ducts - Ans--the subdivisions of the respiratory bronchioles, which
terminate in the alveolar sacs that resemble clusters of grapes.
Alveoli - Ans--tiny sacs of lung tissue specialized for the movement of gases
between air and blood
alveolus - Ans--air sac in the lung
respiratory membrane - Ans--where gas exchange occurs between the air
on the alveolar side and the blood on the capillary side; the alveolar and
capillary walls form the respiratory membrane
Lungs - Ans--Main organs of the respiratory system
Urinary Systems Questions And
Answers| 2026 Update
conducting zone - Ans--nose to terminal bronchioles
nares - Ans--nostrils
nasal cavity - Ans--hollow space behind the nose
oral cavity - Ans--mouth
Pharynx - Ans--throat
nasopharynx - Ans--region of the pharynx at the back of the nose and above
the soft palate
oropharynx - Ans--central portion of the pharynx between the roof of the
mouth and the upper edge of the epiglottis
laryngopharynx - Ans--lower part of the pharynx, just below the
oropharyngeal opening into the larynx and esophagus
glottis - Ans--Opening between vocal cords
Epiglottis - Ans--A flap of tissue that seals off the windpipe and prevents
food from entering.
Larynx - Ans--voice box
thyroid cartilage - Ans--Adam's apple
, hyoid bone - Ans--a U-shaped bone in the neck that supports the tongue.
Trachea - Ans--windpipe
carina - Ans--Point at which the trachea bifurcates (divides) into the left and
right mainstem bronchi.
bronchial tree - Ans--branched airways that lead from the trachea to the
microscopic air sacs called alveoli
primary bronchi - Ans--The first branches of the trachea. There are two
primary bronchi, one for each lung.
secondary bronchi - Ans--The primary bronchi split into these smaller tubes
within the lungs
Bronchioles - Ans--smallest branches of the bronchi
respiratory zone - Ans--site of gas exchange, respiratory bronchioles,
alveolar ducts, alveoli
terminal bronchioles - Ans--smaller than 0.5 millimeter and these mark the
end of the conducting zone
alveolar ducts - Ans--the subdivisions of the respiratory bronchioles, which
terminate in the alveolar sacs that resemble clusters of grapes.
Alveoli - Ans--tiny sacs of lung tissue specialized for the movement of gases
between air and blood
alveolus - Ans--air sac in the lung
respiratory membrane - Ans--where gas exchange occurs between the air
on the alveolar side and the blood on the capillary side; the alveolar and
capillary walls form the respiratory membrane
Lungs - Ans--Main organs of the respiratory system
