The Respiratory System

nitrogen, oxygen

main gases that make up air

78%

the percent of nitrogen in the atmosphere

21%

the percent of oxygen in the atmosphere

NO

is respiration and breathing the same?

respiration

overall exchange of gases (how the body gets oxygen and gets rid of carbon dioxide) between the atmosphere, blood, and cells; body obtains & uses oxygen + removes Co2 & H2O

phase

breathing is just a _ _ _ _ _ in respiration.

4

respiration in land vertebrates include how many phases?

breathing, ventilation

the act of taking air in (inspiration) & out of the lungs (expiration)

braep

breathing is derived from the word...?

odor, smell

definition of Old English word, braep

external respiration

the exchange of oxygen & carbon dioxide between the air and the blood within the lungs

internal respiration

the exchange of oxygen & carbon dioxide between the blood and the body cells

down, expand

when inhaling, the diaphragm muscle moves _ _ _ _ and the lungs _ _ _ _ _ _.

false

air moves out manually when exhaling.

cellular respiration

chemical reaction that uses oxygen (oxidation) to release/break down energy (glucose/sugar) from food; energy-releasing process fueled by oxygen

6 liters

every minute, you breathe in about __________ of air.

nostrils, nasal cavities, pharynx, larynx

the upper respiratory tract consists of?

nose & mouth

passageway into respiratory system that helps to warm air

throat

another name for pharynx

pharynx

transports air, food, & water

trachea, esophagus

the pharynx includes parts of the?

voice box

another name for larynx

vocal cords

what are stretched across the larynx opening?

wind pipe

another name for trachea

trachea

carries air from the larynx to the lungs; covered in cartilage for protection

bronchi

two tubes split off from trachea; one tube goes into each lung

bronchioles

each bronchial tube splits into tiny tubes called?

esophagus

passageway to the digestive system

trachea

passageway to the respiratory stem/the lungs

epiglottis

flap of tissue that closes the entrance to the rest of the respiratory system when you swallow

larynx

located on top of the trachea

adam's apple

what is the thyroid cartilage?

air sacs

tiny sacs in lungs that are surrounded by capillaries ( O2 enters bloodstream, CO2 exits )

blood

oxygen is carried to all parts of your body in your?

trachea

the bronchial tubes start at the bottom of your?

cilia

dirt is kept out of your lungs by tiny hair called?

diaphragm

dome-shaped muscle that contracts rhythmically and continually during the process of breathing

intercostal muscles

muscles between the ribs; muscles that contract during inhalation

trachea, bronchi, bronchioles, alveoli

parts of the lower respiratory tract

lungs

main organs of the respiratory system; sponge-like

left

which lung is smaller?

lobes

lungs are divided into sections called?

pleura

membrane surrounding the lungs

alveoli

where gas exchange occurs; site of respiration in the lungs

cutaneous respiration

gas exchange system that occurs through the skin

gills

allow for gas exchange underwater

tracheal system

gas exchange system used by insects

medulla oblongata

breathing center of the brain

1

how many liters of air do we breathe every second?

13

a person at rest breathes in about __ times a minute.

true

air is rarely in the lungs for more than a few seconds.

carbon dioxide

what else does cellular respiration produce?