Unit 2 - Respiration Flashcards
What is respiration?
exchange of gas between an organism and its environment
What are the four main parts of the respiratory system?
Respiratory airway
pulmonary system
skeletal support
muscles of inspiration and exhalation
What are the parts of the respiratory airway? (3)
Nasal cavity
Oral cavity
Pharynx
What are the openings to the nasal cavity called?
Nares
What happens to air breathed in through the nasal cavity (as opposed to the oral cavity)
warmed, moistened, filtered
How is air filtered when breathed in through the nasal cavity?
specialized epithelium (mucous membranes and cilia)
What are the three sections of the pharynx?
Nasopharynx - behind nasal cavity
Oropharynx - back of the mouth
Hypopharynx/laryngopharynx - common area for nose and mouth
What are the two functions of the hypo/laryngopharynx?
swallowing and breathing
What are the parts of the pulmonary system? (4)
Larynx
trachea
bronchi/bronchial tubes
lungs
What is the primary function of the larynx?
biological - acts as a valve during eating, etc
What is the secondary function of the larynx?
phonatory
What is the trachea?
rigid, flexible tube
What surrounds the trachea?
16-20 rings of hyaline cartilage that open at the back
What connects the cartilage rings around the trachea?
mucous membrane
What lines the trachea?
cilia
What do the cilia in the trachea do?
move the mucous blanket the covers the inside of the trachea up and out - gets rid of bad stuff that might be in the trachea (pollen, dust, etc)
What is the carina?
the point where the trachea divides into two bronchi
What is aspiration?
when something that shouldn’t gets below the level of the vocal folds
At what point are the bronchi no longer surrounded by cartilage (or have cilia in them)?
when they have started dividing into bronchials
What is different about the right lung compared to the left
it is slightly more in line with the trachea - aspiration more likely to occur in this lung
Where are the alveoli located?
In the lungs, housed within the alveolar ducts
what is surfactant?
lubrication in the lungs
helps the tissue covering lungs and ribs move together smoothly
What is COPD? (Chronic obstructive pulmonary disease)
Alveoli lose elasticity
alveoli are destroyed
bronchial walls become thick and inflamed
Left lung has __ lobes
2 - superior, inferior
right lung has __ lobes
3 - superior, middle, inferior
What shape are the lungs?
conical
What are the lungs made of?
spongy, elastic tissues – NO MUSCLES
Where is the diaphragm located?
under the base of the lungs
What is pleura?
tissue that covers lungs and inner thoracic cavity
What is the purpose of the pleura?
a means of smooth contact for rough surfaces
translates force into inspiration making respiration efficient
Where does the exchange of gas happen?
Alveoli
What are the parts of the skeletal support system? (4)
Rib cage
vetebral column
pelvic girdle
pectoral girdle
What are the parts of the Thoracic cavity? (4)
rib cage
mediastinum
pleural membranes
pulmonary system
What is in the mediastinum?
heart, blood, lymph vessels, esophagus, thymus gland (antibodies), phrenic nerves (innervates diaphragm)