Respiratory System Flashcards
What is respiration?
process of bringing oxygen (O2) into the body, using it to make ATP which generates
carbon dioxide (CO2), then eliminating CO2 from the body
What is the point of respiration?
To make ATP. ATP supports metabolism.
Oxygens function is respiration?
It helps cells make ATP
Five stages of respiration
ventilation
External respiration
Transport
internal respiration
Cellular respiration
Ventilation
also known as “breathing”
- inspiration (breathing in) is the process of
moving good air (O2) in - expiration (breathing out) is the process of
moving bad air (CO2) out
External Respiration
(also known as alveolar gas exchange) is the diffusion of gasses across the respiratory
membrane
What are alveoli?
(External Respiration)
alveoli are the tiny air sacs at the ends of our airways that
Respiratory membrane structure and function
respiratory membrane = alveolar simple squamous + capillary simple squamous
- O2 moves from alveoli to pulmonary capillaries
- CO2 moves from pulmonary capillaries to alveoli
transport
(apply what you learned about the path of blood through the heart and circulatory
circuits)
the movement of gasses through the circulatory system
Do o2 and CO2 travel in same vessels or same direction?
(transport)
No to both.
O2 pathway in circulatory system?
(transport)
pulmonary capillaries
pulmonary veins
left atrium
left ventricle
aorta
systemic arteries
systemic capillaries
CO2 pathway in circulatory system?
(transport)
CO2 is formed in the tissues
enters the circulation at the
systemic capillaries
systemic veins,
vena cavae,
right atrium,
right ventricle
pulmonary artery
pulmonary capillaries
Internal respiration
(also known as systemic gas exchange)
diffusion of gasses between the blood and
the extracellular/intracellular fluid
O2 flow
(internal respiration)
blood in systemic capillaries
interstitial fluid
cells
CO2 flow
(internal respiration)
cells
interstitial fluid
blood of the systemic capillaries
