Module 10 ML-3 Flashcards
What are the functions of the respiratory system
-gas exchange
-regulates pH of blood
- forms speech sounds
-defends againist micrones
-influence concentrations of chemical messengers
-traps and dissolves blodo clots
What is the organization of the respiratory system
nasal cavity, nostril, mouth, larynx, trachea, righ main bronchus, lung
How are the epiglottis and golttis related
epiglottis is a flap that covers the glottis (hole) to protect the vocal cords when eating
What is the purpose of cilia at the ends of bronchioles
constantly flow upward towards pharynx
What do the cilia do to mucus
it is moved by the pharynx where it is them swallowed
Goblet cell
secretes mucus into the airway
What is in the conducting zone
traches, bronchi, bronchioles, and terminal brnchioles
What does smooth muscle allow the bronchioles to do
constrict or dilate
What is in the respiratory zone
respiratory bronchioles, alveolar ducts alveolar sacs
What does the conducting zone do
-provides low resistance pathway for airflow
-defends against microbes and toxic cehmicals
-warms and moistens the air
- sound production
What happens in the respiratory zone
gas exchange between alveoli and pulomnayry capillaries
Does the terminal bronchiole have alveoli
no
What is the main site ofr gas exchange
alevoli
Type 1 alveolar cells
flat, make up alveolr walls, main sight for exchnage, common
Type 2 alveolar cells
spherical shape and secrete surfactant
