The Respiratory System Flashcards
what is the purpose of the respiratory system
to provide constant supply of oxygen to the blood and to remove carbon dioxide from the blood
what are the requirements for respiration
1) respiratory surface must be moist
2) respiratory surface must be large
3) resorption surface must be thin
what is the pathway of air in the respiratory system
mouth/ nose, trachea, bronchi, bronchioles, alveoli, bloodstream (and reverse for CO2)
what happens in the mouth and nose in the respiratory system
-brings air into the body
-nasal hairs (cilia) and muscle in the nostrils trap dust as bacteria
what happens in the nasal cavity in the respiratory system
-warms, cleans, and moistens air (which speeds up process)
-has glands that produce sticky mucus which traps dust and other materials not trapped by the nasal hairs
what is the nasal cavity
-large air filled space behind the nose
what is the trachea
an air conducting tube
-also lined with mucus membranes and cilia
-made of strong cartilage rings
what is another name for the trachea
windpipe
what occurs in the trachea in the respiratory system
-connects the back of the throat (pharynx) with the bronchi
what is the back of the throat called
pharynx
what is the bronchi
two short tubes that branch off the lower end of the trachea, connects the trachea to the lungs
what are bronchioles
tiny branches of air tubes in the lungs that connect bronchi to alveoli
what are alveoli
-tiny, thin-walled grape like clusters at the end of each bronchiole
-surrounded by capillaries
what occurs in the alveoli
-gas exchange
-carbon dioxide out of blood and oxygen into blood
what is the pleura
-membrane lining the lungs (alveoli and bronchioles)
-purpose is to keep organs moist
