What are the four places respiration takes place throughout the body
breathing
external repiration
internal respiration
cellular respiration
what are the 6 functions of repiration
acts as passageway for respiration
regulation of blood pH
moistens and warms incoming air
voice production
olefaction
protection
defenses of the respiratory system
mucus - entraps microorganisms
cilia - push micro organisms and mucus up and out of respiratory tract
cough reflexes
what are the two divisions of the respiratory tract
upper
lower
what are the components of the upper respiratory tract
nose, nasal passagways
pharynx
what are the components of the lower respiratory tract
larynx
trachea
bronchi and bronchioles
lungs
alvioli
Upper respiratory tract:
nose and nasal passages consist of?
external nose
nasal cavity
hard palate : floor of the nasal cavity
nasal septum : partition dividing cavity
Upper respiratory tract: pharynx (3 regions)
common opening for digestive and respiratory systems
three regions are :
nasopharynx - lined with pseudostratified columnar epithelium with goblet cells. Mucus and debris is swallowed. openings of escuchian tubes. floor is the soft palate
Oropharynx:
lined with moist stratified epithelium
laryngopharynx - lined with moist stratified epithilium
Lower respiratory tract: larynx (4)
unpaired cartilages
thyroid: largest, adams apple
cricoid: most inferior, base of larynx
epiglottis: attached to thyroid and has a flap near the base of the tongue
true vocal chords: sound production. Opening between is the glottis
what are the functions of the larynx (4)
maintain an open passageway for air movement: thyroid and cricoid cartilages
epiglottis and vestibular folds prevent swallowed material from moving into larynx
vocal folds are primary source of sound preduction
the pseudostratified ciliated columnar epithelium traps debris, preventing thier entry into the lower respiratory tract
Lower respiratory tract: trachea functions (5)
transports air to and fromn lungs
membranous tube of dense regular connective tissue and smooth muscle
supported by 15-20 hyaline cartilage C shaped rings open posteriorly
posterior surface is elastic ligamentous membrane and bundles of smooth muscle called the trachealis
contracts during coughing
what does the tracheobronchial tree consist of
trachea to terminal bronchioles which is ciliated for the removal of debris
what does the trachea divide into
two primary bronchi
the primary bronchi devide into?
secondary bronchi (one/lobe)
the secondary bronchi devide into ?
tertiary bronchi
the tertiary bronchi define what?
bronchopulmonary segments
the tertiary further devide into what?
bronchioles
bronchioles then finally devide into what?
terminal bronchioles
what is the respiratory zone?
site for gas exchange
respitory bronchioles branch from where?
terminal bronchioles
respiratory bronchioles have a lot of alveoli, True or False
false
what does the respitory bronchioles give rise to?
aveolar ducts which have more alvioli
alveolar ducts end as what
alveolar sacs
are there cilia in the respiratory bronchioles?
no
how is debris removed from the respiratory bronchioles
its removed by microphages
where does the microphages move debris?
into nearby lymphacytes or into terminal bronchioles
what are the 3 types of cells in the respiratory membrane
Type 1 pneumocytes
type 2 pnuemocytes
dust cells
Type 1 pneumocytes are made of what cells
thin squamous epithelium
type 1 pneumocytes make up what percentage of the surface of alveolus
90%
type 1 pneumocytes are responsible for
gas exchange
Type 2 pneumocytes are made of what cells
round to cube shaped secretory cells
type 2 pneumocytes are responsible for
producing surfactant
what are the 3 layers of the respiratory membrane?
alveolar epithelium (simple squamous epithelium)
basement membrane of the alveolar epithelium
basement membrane of the capillary endothelium (simple squamous epithelium)