13. The Respiratory System Flashcards
what does the respiratory system allow
gaseous exchange between external environment and blood
what is the path that air travels from the pharynx
pharynx
larynx
trachea
bronchi
bronchioles
alveoli
what do alveoli allow for
exchange of oxygen with CO2 in blood
what muscle is involved in inspiration and what does it do
diaphragm contracts
what muscle is involved in expiration and what does it do
diaphragm relaxes
what is the nasal cavity’s function
moistens and warms and filters incoming air
what does the mucus and internal hairs do
mucus = moistens air
internal hairs = filters and traps particles
what does the pharynx act as
passageway for air and food
what does the larynx do
act as voicebox and contains the vocal chords
what is the alveolis function
site for respiratory exchange of gases
what happens to oxygen after it reaches alveoli
oxygen diffuses into capillaries and enters red blood cells
