2.1 Anatomy of Respiratory system Flashcards

1
Q

What are the 4 processes of Respiration

A
  • Respiratory system
    • Pulmonary ventilation (breathing): movement of air into and out of lung
    • External respiration: exchange of O2 and CO2 between lungs and blood
  • Circulatroy System
    • Transport of O2 and CO2 in blood
    • Internal respiration: exchange of O2 and CO2 between systemic blood vessels and tissues
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2
Q

what are the amjor rogans of the upper respiratory system

A
  • Nose and nasal cavity

– Paranasal sinuses

-pharynx

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3
Q

what are the major organs of the lwoer respiratory system

A
  • larynx

– Trachea
– Bronchi and branches

– Lungs and alveoli

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4
Q

What is the function of the nose

A
  • produces mucus, fitlers, warms and mositens incoming air; resonance chamber for speech

– Provides an airway for respiration
– Moistens and warms entering air
– Filters and cleans inspired air
– Serves as resonating chamber for speech – Houses olfactory receptors

*divided into two regions: external nose and nasal cavity

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5
Q

what is the function of the paranasal sinuses

A
  • lightens skull
  • may warm, moisten and filter incoming air
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6
Q

trachea and gas exchange

A

has no direct role in gas exchange

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7
Q

what are the areas of the external nose

A
  • Root (area between eyebrows)
  • Bridge,
  • Dorsum nasi (anterior margin)
  • Apex (tip of nose)

*Nostrils (nares): bounded laterally by alae

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8
Q

what is part of the external nose

A

formed by: Nasal bone forms bridge of nose, frontal bone forms root and maxillary bone laterally

  • Plates of hylain cartilage inferiorly
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9
Q

Decribe the structure of the ansal cavity

A
  • Divided by midline nasal septum
  • formed anteriorly by septal cartilage, and posteriorly by vomer bone and perpendicular plate of ethmoid bone
  • Posterior nasal apertures (chonanae): opening where naso cavity turns into nasopharynx
  • Roof: formed by Ethmoid and sphenoid bones
  • Floor: formed by hard palate (bone) and soft palate (muscle)
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10
Q

where is the nasal vestibule

what is it lined with

A

nasal cavity superior to nostrils (near nostrils)

• Lined with vibrissae (hairs) that filter coarse particles from inspired air

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11
Q

what muscus membranes line the nasal cavity

A
  • Olfactory mucosa:
    • lines superior region of nasal cavity and contains olfactory epithelium
  • Respiratory mucosa:
    • pseudostratified ciliated columnar epithelium
    • contains goblet cells and many seromucous nasal glands
  • Seromucous nasal glands
    • contain mucus-secreting mucous cells and serous cells (mucus and serous secretions contain lysozyme and defensins)
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12
Q

what is the Nasal conchae

what are the sections

A
  • scroll line, mucosa covered projections that protrude medially from each alteral wall of nasal cavity

sections are: sueprior, middle and inferior conchae (shape of them hels to increase contact with air)

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13
Q

what does the nasal conchae do during inhalation and exhalation

A

During inhalation they filter, heat, and moisten air

During exhalation they reclaim heat and moisture

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14
Q

what is teh nasal meatus

A

groove inferior to each concha

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15
Q

paranasal sinuses

what is their form, location and function

A

Form: ring around the nasal cavities

Location: frontal, sphenoid, ethmoid and maxillary bones

Function: lighten skull, secrete mucus, help watm and moisten air

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16
Q
A
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17
Q

What is rhinitis

A
  • form of homeostatic imbalance
  • Inflammation of nasal mucosa

– Nasal mucosa is continuous w/ mucosa of respiratory tract -> infections spread from nose to throat to chest

– Can spread to tear ducts and paranasal sinuses, causing blockage of sinus passageways

*Can lead to absorption of air, producing a vacuum, resulting in sinus headache

18
Q

describe the shape, location, compostion and regions of the pharynx

A

shape: funnel muscular tube
location: runs from base of skull to Certevra C6, connects nasal cavity and mouth to larynx and esophagus
composition: skeletal muscle

Regions: nasopharynx, oropharynx, laryngopharynx

19
Q

describe the nasopharynx

lining?

tonsil?

any other tube thing?

A

– Air passageway posterior to nasal cavity

– Lined w/ pseudostratified columnar epithelium

– Soft palate and uvula close nasopharynx during swallowing

– Pharyngeal tonsils (adenoids) located on posterior wall

– Pharyngotympanic tubes (auditory tubes) drain and equalize pressure in middle ear and open into lateral walls

20
Q

describe the Oropharynx

lining?

tonsils?

A

– Passageway for food and air from level of soft palate to epiglottis

– Lining consists of stratified squamous epithelium

Isthmus of fauces: opening to oral cavity

Palatine tonsils located in lateral walls of fauces

Lingual tonsil located on posterior surface of tongue

21
Q

describe the laryngopharynx

A

– Passageway for food and air

– Posterior to upright epiglottis

– Extends to larynx, where it is continuous with esophagus

– Lined with stratified squamous epithelium

22
Q
A
23
Q

waldeyer’s Tonsillar ring

A

Nasal tonsils are: 2x tubal tonsils and pharyndeal tonsil

Oral tonsil: 2x palatine tonsil and a ligual tonsil

*tonsils are used to detect pathogens

24
Q

what happens if adenoids are ifnected and swollen

A

(same type of function as tonsils but are a bit diff)

Infected and swollen adenoids can block air passage in nasopharynx, making it necessary to breathe through the mouth

As a result, air is not properly moistened, warmed, or filtered before reaching lungs

When adenoids are chronically enlarged, both speech and sleep may be disturbed

25
Q

what are the two zones of the lweor respiratory sstem

A

* lower resp system contains Larynx, trachea, bronchi, and lungs

zones are

  • Conducting zone: conduits that transport gas to and from gas exchange sites
    • Includes all other respiratory structures
    • Cleanses, warms, and humidifies air
  • Respiratory Zone: site of gas exchange
    • Consists of microscopic structures such as respiratory bronchioles, alveolar ducts, and alveoli
26
Q

larynx

its location and 3 functions

A

extends from 3rd to 6th cervical vertebra and attaches to hyoid bone

  • opens into laryngopharynx and is continous with trachea

functions are: provides patent airway (air in and out of lungs) , routes air and food into proper channels, voice production

27
Q

cartilages of the layrnx

A
  • 9 cartilages connected by membranes and ligaments
    1: Thyroid cartilage: has laryngeal prominence (adams apple)
    2: Cricoid cartilage: ring shape

3 &4: paired arytenoid cartilage

5&6: paired cuneiform cartilage

7&8: paired corniculate cartilage

9: Epiglottis

28
Q
A
29
Q
A
30
Q

describe the vocal fodl of the larynx

A
  • Vocal ligaments: form care vocal forms (true vocal cords)
  • ligamets lie deep to laryneal mucosa and attach arythenoid cartilages to thyroid cartilage
  • contains elastic fibers that appear white bc of black of blood vessels
  • folds vibrate to produce sound as air rushes up from lungs
31
Q

what is the glottis

A

opening between vocal folds

32
Q

what are the vesitbualr folds

A
  • false vocal chords
  • superior to vocal folds
  • no part in sound production
  • help to cose the flottis during swallowing
33
Q

how does voice production work

what shapres it

what determines pitch

what determiens oudness

A
  • speech is intermittent release of expired air during opening and closing of glottis
  • Chambers of pharynx and oral, nasal, and sinus cavities amplify and enhance sound quality
  • Sound is “shaped” into language by muscles of pharynx, tongue, soft palate, and lips
  • Pitch is determined by length and tension of vocal cords
  • Loudness depends upon force of air
34
Q

what it pitch and loudness

A
35
Q

what is laryngitis

A
  • form of homestatic imbalance
  • inflammation of the vocal folds -> swell and interferes w/ vibrations
  • causes change in vocal tone, hoarseness and in severe cases speaking limited to whisper
  • usually caused by viral infections, can be due to overuse of voice, very dry air, bacterial infections, tumors on vocal folds or inhalation of irritating chemicals
36
Q

structure of trachea

A

aka windpipe

  • extends from larynx into mediastinum, where it divides into two main bronchi

– ~4 inches long, 3/4 inch in diameter, and very flexible

37
Q

what are the 3 layers of the trachea wall

A

– Mucosa: ciliated pseudostratified epithelium with goblet cells

– Submucosa: connective tissue with seromucous glands supported by 16-20 C-shaped cartilage rings that prevent collapse of trachea

– Adventitia: outermost layer made of connective tissue

38
Q

what is trachealis

A
  • part of trachea
  • consists of smooth muscle fibers that connect posterior parts of cartilage rings
  • contracts during coughing to expel mucus
39
Q

what is the carina

A
  • trachea
  • last tracheal cartilage that is expanded and found at point where trachea branches into two main bronchi
  • mucosa of carina highly sensitive
  • > violent coughing will be triggered if any foreign object makes contact with it
40
Q

descirbe theeheimlich maneuver

A
  • expel air in victims lungs to “pop out” or expen an obstructing piece of food
  • if do wrong can crakc ribs
41
Q

impact of smoking on respiration

A

inhibts and ultimately destroys cilia

  • without ciliary activity, coughing is only way to prevent mucus from accumulating in lungs
  • reason smokers with resp congestion should avoid medication that inhibit cough relfex