Respiratory system Flashcards
Parts of the respiratory system
External nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs
Ventilation
the movement of air into and out of the lungs
Respiration
the exchange of gasses
External respiration
the movement of gases between air in the lungs and blood
Internal respiration
exchange of gases between the tissues and blood
Upper respiratory tract
from the nose to the larynx
Lower respiratory tract
structures from the trachea to the lungs
Respiratory system functions
Ventilation, external respiration, gas transport, internal respiration, regulation of blood ph, production of chemical mediators, voice production, olfaction, protection
nasal cavity
the chamber inside the nose and guides the air to the opening of the pharynx called the choanae
hard plate
separates the nasal and oral cavity
Nasal septum
the soft tissue and posterior bone that divides the two sides of the nose
nasolacrimal duct
allows for liquid drainage from the eyes
functions of the nasal cavity
passageway, cleans air, warms air, contains the olfactory sensory cells, determine voice sound
Pharynx
the opening for both the digestive and respiratory tract.
Nasopharynx
contains the soft plate that prevents food from entering the nasal cavity by pushing the food to the back of the cavity. It also defends against infection and stabilizes sound waves.