provides oxygen and gets rid of CO2
little sacks for gas exchange
Functions of Respiratory System
1)provides large area for gas exchange between air and blood
2)moves air to and from alveoli
3)protects resp. surfaces from dehydration and temp change
5)provides olfactory sensation
pH of body
upper resp. tract structures go...
down to(not including) larynx
lower resp. tract structures....
begins at larynx to alveoli
Conducting portion are the...
nasal cavity, larynx, trachea, bronci, large bronchioles
Respiratory portion are the...
small bronchioles, alveoli-->gas exchange
mucus lines airways to..
capture foregin things
opening in nose
spaces in nasal tissue
divides nasal cavity in 1/2
between nasal cavity and naso-pharynx
cilia sweep mucus and trapped debris to...
pharynx to be swallowed
exposure to some things causes....
a runny nose
role of nasal cavity is...
warm,humidify, and clean air
3 subdivisions of Pharynx
1)nasopharynx-->internal layers-soft pallet
2)oropharynx-->soft pallet-base of tongue
3)laryngopharynx-->base of tongue-enterance of esophagus
small opening between pharynx and larynx
covers glottis during swallowing
very large(adams apple)
provides support to larynx
false vocal cords
upper pair of ligaments that prevent objects from going into glottis
true vocal cords
small muscles insert on thyroid and arytenoid cartilages change...
postion and alter tension
air passing through glottis vibrates...
tough flexible tube
branch off of trachea
no cartalidge and much smooth muscle
150 million______per lung
very light and spongy
covers inner surface of body wall
covers outer surface of lung
3 steps of respiratory physiology
1)pulmonary ventilation=take air in and out of face
2)gas exchange=between blood and inhaled air(external respiration)
3)gas transport=gases moved from lung to capillaries
low O2 levels
no oxygen getting to tissues
physical movement of air in and out of lungs
blood flow changes through actions of ...
airflow changes through actions of...
medulla oblongata & pons regulate...
respiratory muscles and respiratory rate
medulla oblongata & pons respond to...
speech, senses, motions
changes in respiration due to changes to sensory info.
Mechanoreceptor responds to changes in...
pressure(volume of lungs) or (arterial BP)
chemoreceptor respond to...
chemical changes in blood and CSF