Respiratory System Flashcards
it is a continuous network of tubules that functions in exchanging gases by acquiring oxygen and removing carbon dioxide from the blood
oxygen is breathed in and carbon dioxide is expelled
respiratory system
the act of breathing or exchange of gases by diffusion across plasma membranes
respiration
referred to as the breathing process or the physical movement of air into and out of the respiratory passages and the lungs
ventilation
the movement of gases between atmospheric air in the lungs and the blood
pulmonary respiration or external respiration
the movement of gases between the blood and the body’s cells
systemic respiration or internal respiration
sense of smell is activated when breathing moves air to the odor receptor cells in the nose
olfaction
movement of air across the vocal cords in the larynx produces sound and makes speech possible
sound production
breathing volume and rate determine the concentration of carbon dioxide in blood, which affects blood pH
regulation of blood pH
the lungs produce an enzyme called angiotensin-converting enzyme (ACE), which is an important component of blood pressure regulation
production of chemical mediators
the respiratory system provides __________ against some microorganisms by preventing them from entering the body and removing them from respiratory surfaces
protection
these are structures from the nose to the smaller air tubes within the lungs and is strictly for ventilation
conducting zone
these are structures solely within the lungs and includes some specialized small air tubes and the alveoli
gas exchange occurs within this zone
respiratory zone
the entire __________ __________ __________ is lined with epithelium that secretes mucus
dust and other inhaled particles trapped in the mucus are swept out by waving cilia
coughing brings the mucus up
upper respiratory tract
forms the external entrance to the nasal cavity, function in breathing, immunity, and the sense of smell
nose / nasus
the anterior external openings
stiff hairs at the entrance keep dust and other large particles out
nares / nostrils
open chamber inside the nose and adjusts the temperature and humidity by warming the incoming air to ensure that the respiratory surface of the lungs remain moist
it is also a resonating chamber for speech
nasal cavity
a wall of tissue that divides the nasal cavity into left and right halves
nasal septum
a region in the anterior part of the nasal cavity which is lined with mucous membrane consisting of pseudostratified ciliated columnar epithelium with goblet cells
vestibule
___________ is secreted by the goblet cells to catch airborne bacteria and dust particles
mucus
the ___________ on the surface of the mucous membrane sweep the mucus posteriorly to the pharynx, where it is swallowed and eliminated by the acidic secretions of the stomach
cilia
three lateral bony ridges on each side of the nasal cavity, helping the air churn through the nasal cavity
concha / turbinates
the common opening of both digestive and the respiratory systems
also known as the throat
pharynx
receives air from the nasal cavity and receives air, food, and drink from the oral cavity
it is connected to the respiratory system at the larynx and to the digestive system at the esophagus
pharynx
the three portions of the pharynx
nasopharynx
oropharynx
laryngopharynx
the most superior portion of the pharynx and is a continuation of the nasal cavity
nasopharynx
it is continuous with the middle ear through the auditory tubes
it houses the pharyngeal tonsil which helps defend the body against infection
nasopharynx
air, food, and drink pass through here
the palatine and lingual tonsils are located near this area
the middle portion of the pharynx and a continuation of the nasopharynx
oropharynx
it is a continuation of the oropharynx
it spans the posterior length of the larynx, from the most superior larynx structure, the epiglottis, to the esophagus
laryngopharynx
food and drink pass through here to the esophagus while most air passes from here into the larynx
laryngopharynx
it occurs when the muscles that support the soft tissues in your throat, such as your tongue and soft palate, temporarily relax
when these muscles relax, your airway is narrowed or closed, and breathing is momentarily cut off
obstructive sleep apnea (OSA)
the first-line treatment for OSA in adults is __________ __________ __________ __________ therapy
these machines work by delivering pressurized air through a hose and mask into the airway during sleep
these steady flow of air keeps the airway open, improving respiration and sleep quality
continuous positive airway pressure (CPAP)
located in front of the laryngopharynx and extends from the base of the tongue to the trachea
larynx / voice box
it directs chewed food toward the esophagus and away from the respiratory system
its rigid structure helps keep the airway constantly open, or patent
it is formed by nine rigid cartilage with the largest which is a shield shaped thyroid cartilage
larynx / voice box
these are two elastic bands of tissue stretched over the larynx and vibrate as air from the lungs passes through
vibrations of these produce the sounds of speech
vocal cords / vocal folds
a slit-like opening between the vocal cords allowing the passage of air
glottis
a cartilage flap that covers the glottis during swallowing to allow entry of food into the esophagus and not the lungs
it helps protect the lower respiratory tract from foreign materials
epiglottis
consists of the trachea and the network of air tubes in the lungs
tracheobronchial tree
the trachea divides to form a ____________, each of which divides to form smaller and smaller ___________
left and right main bronchus
bronchi
the smaller bronchi continue getting smaller until they terminate in microscopic ___________ and ___________
tubes and sacs
the walls of the air passageway are supported by cartilage and smooth muscle as well as lined with ciliated epithelium which functions as a ______________ ___________, trapping debris from the air and moving it to the larynx
mucus-cilia escalator
it is an air-cleaning tube just beneath the larynx and allows air to flow into the lungs
it is lined by a mucous membrane with goblet cells that produce mucus
trachea / wind pipe
15 to 20 C-shaped of hyaline cartilage that reinforces the trachea
tracheal rings
these support the trachea and prevent it from collapsing
the cartilages support the anterior and lateral sides of the trachea to protect it while maintaining a patent passageway for air
tracheal rings
two passageways of air branching out from that trachea and lead to each lung
they branch repeatedly, each branch decreasing in diameter and wall thickness
bronchi / main bronchi / primary bronchi
a ridge of cartilage located where the trachea divides into two main bronchi
it has a mucous membrane sensitive to mechanical stimulation
if foreign matter is inspired to the level of it, it stimulates a powerful cough reflex
carina
arise directly from the main bronchi
in the left lung, there are two of these
in the right lung, there are three of these
each of these supplies its own section of lung lobe
lobar bronchi / secondary bronchi
supply subdivisions within each lung lobe, which are called bronchopulmonary segments
as the bronchi become smaller, the cartilage becomes sparse, and smooth muscle becomes abundant
segmental bronchi / tertiary bronchi
often an emergency procedure that’s performed on people who are unconscious or who can’t breathe on their own
it maintains an open airway and helps prevent suffocation
endotracheal intubation (EI)