Respiratory System, Respiratory System Flashcards
oxygen
most _________ in the blood is carried bound to hemoglobin
nasal cavity
the cavity behind the nose and above the roof of the mouth that filters air and moves mucous and inhaled contaminants outward and away form the lungs.
bronchioles
small tubes that branch off the bronchi that contain clusters of alveoli at each end.
trachea
The main air tube leading into the respiratory system. The trachea is made of alternating rings of cartilage and connective tissue.
larynx
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
respiratory system
system responsible for taking in oxygen and releasing carbon dioxide using the lungs
hemoglobin
specialized protein that carries oxygen on red blood cells
Carbon dioxide
Breathing center in brain sends a signal to breathe, in response to a high concentration of this gas in the blood.
capillaries
tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body
organs of the respiratory system
Lungs,trachea, pharynx, larynx, nose
mucus
a slimy substance produced in the nose and throat to moisten and protect them
Alveoli
tiny sacs of lung tissue specialized for the movement of gases between air and blood
Bronchi
Two short branches located at the lower end of the trachea that carry air into the lungs.
Bronchioles
progressively smaller tubular branches of the airways
Epiglottis
a flap of cartilage that covers the windpipe while swallowing
Expiration/Exhalation
the act of expelling air from the lungs
Inhalation/Inspiration
the act of inhaling
Pharynx
the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.
Lungs
two spongy organs, located in the thoracic cavity enclosed by the diaphragm and rib cage, responsible for respiration
Nose (nasal cavity)
warms, moistens, & filters air as it is inhaled
Respiration
process of gas exchange in the body
Trachea
membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
Diaphragm
muscle that forms the thoracic floor, when it contracts it flattens and help lungs expand for inhalation
brochitis
inflammation of the bronchi