the respiratory system

Question 1

function of respiratory system:

Answer 1

takes in oxygen, removes carbon dioxide

Question 2

primary organ of respiratory system:

Answer 2

lungs

Question 3

how does air enter

Answer 3

1. mouth or nose, nasal passages

2. into pharynx and larynx (voice box)

Question 4

nasal passages have tiny hairlike structures called

Answer 4

cillia. beat back and forth to move mucus upward

Question 5

each bronchus enters a lung and branches into

Answer 5

branchioles

Question 6

alveoli are sacs at the end of each

Answer 6

bronchiole

Question 7

the walls of alveoli have capillaries,

Answer 7

tiny blood vessels

Question 8

breathing: air moves

Answer 8

into and out of lungs

Question 9

inhalation

Answer 9

air pressure in lungs < outside of lungs

Question 10

exhalation

Answer 10

air pressure in lungs > outside lungs

Question 11

the ribcage moves up during

Answer 11

inhalation. diaphragm moves down

Question 12

the diaphragm moves up in

Answer 12

exhalation. ribcage moves down

Question 13

gas exchange: process where oxygen and carbon dioxide move

Answer 13

between the bloodstream and the lungs

Question 14

gas exchange: diffusion: oxygen moves into capillaries from

Answer 14

alveoli, carbon dioxide moves into alveoli from cap

Question 15

gas exchange:

Answer 15

concentration of oxygen in blood through lungs > oxygen entering lungs from air

Question 16

the circulatory transports oxygen rich blood to

Answer 16

all body tissues

Question 17

alveoli- efficient gas exchange (LMTD)

Answer 17

1. large surface area
2. moist surface area
3. thin lining
4. dense network

Question 18

capillaries- efficient gas exchange

Answer 18

1. dense network
2. large surface area
3. lining is one cell thick

Question 19

why do alveoli have a large surface area (gas exchange)

Answer 19

to absorb oxygen

Question 20

why do alveoli have a moist surface area for gas exchange

Answer 20

allows for oxygen to dissolve

Question 21

why do alveoli have a thin lining for gas exchange

Answer 21

allows for easy diffusion of gases

Question 22

why do alveoli have a dense network (blood capillaries)

Answer 22

easy gas exchange

Question 23

why do capillaries have a dense network

Answer 23

to carry oxygen and carbon dioxide

Question 24

why do capillaries have a large surface area for gas exchange: to transport

Answer 24

gases

Question 25

why do capillaries have a lining one cell thick for gas exchange

Answer 25

for gases to diffuse efficiently