TEAS 7 respritory system

nasal cavity

step 1: conduction zone, air is humidified and filtered

pharynx

step 2: conduction zone, junction for food and air

larynx

step 3: conducting zone, voice box

trachea

step 4: conducting zone, provides support

bronchus

step 5: conducting zone, 3 right lobes, 2 left lobes

bronchioles

step 6: conducting zone, smaller branches of bronchial airways

alveoli

step 7: respiratory zone, tiny air sacs of lungs, allow rapid gas exchange

conducting zone

transports air from outside to site of gas exchange

respiratory zone

structures in lungs where gas exchange takes place

prefusion

delivering blood to body’s tissues, organs, and cells

ventilation

movement if air in and out of the lungs

hyperventilation

pH is basic, increased O2, decrease CO2

hypoventilation

pH is acidic, decreased O2, increased CO2

inhalation

1. air into lungs

2. diaphragm and external intercostal muscles contract

3. thoracic cavity volume increases

exhalation

1. air out of lungs

2. diaphragm and intercostal muscles relax

3. thoracic cavity volume decreases