Respiratory Patho And Breathing Flashcards
Main structures of the Upper Respiratory Tract
Nose, Pharynx, Larynx
Main Structures of Lower Respiratory tract
Trachea, bronchi tree, lungs
Nose purpose
Passageway for air, moisten, examine for substance that may irritate the resp tract
Paranasal Sinuses
4 air filled cavities, mucous that drains into nasal cavity
Pharynx
Back of throat, divided into 3 parts, lined with mucous membranes
Tonsils
Site of immune reaction ,lymphatic tissue
Larynx
Triangle shaped cartilages, lined by mucous membranes to help remove dust and humidifies air
AKA voice box
Where is the epiglottis located
In Larynx, protects trachea from food and drink
Narrowest part of adult airway
Vocal cords
Narrowest part of a pedicatric airway
Cricoid ring
Vocal cords
Relaxed during normal breathing, contract and they produce sounds
Trachea
Windpipe, supports airway, bifurcates at the carina
Bronchial Tree
Passageway for air, removes all the rest of contaminants before alveoli
The alveoli
Enveloped in networks of capillaries, to accomplish gas exchange between air and blood
Lungs
2 coned shaped organs
Gas exchange happens here and it is most effective because of the massive surface area they provide
Lung Recoil
Occurs because of elastic properties of the lungs
4 Volumes
Tidal
Residual
Expiratory reserve
Inspiratory reserve
4 Capacities
Functional Residual
Inspiratory
Vital
Total Lung
Tidal Volume
Normal amount of air inhaled and exhaled
Residual Volume
Air remaining in lungs after maximum expiration
Expiratory reserve Volume
Maximum volume that can be moved out of the respiratory tract after normal expiration
Inspiratory reserve volume
The maximal amount of additional air that can be drawn into the lungs by determined effort after normal inspiration
Functional residual capacity
Refers to the volume of air left in the lungs after a normal passive exhalation
Inspiratory capacity
Then maximum volume of air that can be inspired after reaching the end of a normal, quiet expiration
Vital capacity
The largest volume of air an individual can move in and out of the lungs
Total lung capacity
The total volume of air a lung can hold
When does inspiration happen
When the atmospheric pressure is higher than the intrathoracic pressure
Active
When does expiration happen
Happens when atmospheric pressure is lower than the intrathoracic pressure
Passive
Inspiratory center
pacemaker of respiratory control centre
rhythmically depolarize and send impulses via the phrenic nerve and intercostal muscles
Expiratory center
When deeper expirations are required frequency of impulses is increased
Factors influencing respiratory center
Direct stimulation, chemoreceptors, baroreceptors,
Hering Breuer reflex
Regulates depth and rhythmaticty of resps
Increase in body temperature
Increases the rate of breathing