🫧🔄🩸

#alveoli #gas exchange #capillaries #respiration #air sacs #oxygen exchange #doolb

🌬️➡️🫁➡️😮‍💨

#breathe #breathing cycle #air flow #oxygen exchange

🫁↔️💨

#lungs #gas exchange #respiration #pulmonary #oxygen exchange

🩸➡️🪀⬅️🩸

#wolf doolb #heart function #sniev #arteries #circulatory circuit #cardiovascular system #oxygen exchange

🫧↔️🩸

#gas exchange #alveoli function #respiration #oxygen exchange #carbon dioxide exchange #blood oxygenation #capillaries

🫁⚪↔️💨

#pulmonary alveolus #gas exchange #oxygen exchange #carbon dioxide exchange #lung function #air sac

🐟↔🌬️

#gills #oxygen exchange #underwater life

🫧⇆🩸

#alveoli #alveolar sacs #gas exchange #capillaries #respiration #oxygen exchange #carbon dioxide exchange #air-blood barrier