respiratory organs

Question 1

nasal cavity

Answer 1

entry and exit of hair

hair lining nostrils filters debris
mucus lined to trap particles and keep lining moist
air gets warmed and moistened here

Question 2

pharynx

Answer 2

passageway for air, opens to esophagus and trachea

Question 3

epiglottis

Answer 3

flap above larynx to prevent foreign substances from entering the trachea

Question 4

larynx

Answer 4

vocal chords

upper end of trachea
2 elastic ligaments that vibrate to cause sound

Question 5

trachea

Answer 5

allow passage of air

mucus and cilia sweep debris
supported by cartilage rings which keeps it open

Question 6

bronchi

Answer 6

carry air into their respective lung

Question 7

bronchioles

Answer 7

deliver air to network of alveoli

no cartilage rings

Question 9

alveoli

Answer 9

tiny grape-like sacs, site of gas exchange

surrounded by capillaries
single layer cells for more rapid gas exchange
lining of lipoprotein, surfactant, to prevent alveoli membrane from sticking to each other

Question 10

pleural membrane

Answer 10

thin fluid filled memrbane that surrounds outer surface of lungs and lines inner wall of chest cavity to reduce friction

Question 11

diaphragm

Answer 11

moves up and down for lung expansion

dome-shaped sheet of muscle

Question 12

intercostal muscles

Answer 12

contracts and relazes to increase and decrease pressure in chest cavity