@zerohourems: Alveoli A&P Recap... 🫁 300 million alveoli work in conjunction to exchange carbon dioxide (CO2) and oxygen 🌟 Surfactant keeps surface tension down in the alveoli, allowing the alveoli to remain open 🌟 Pores of Kohn are small holes between the alveoli. These holes allow for collateral circulation (much like how coronary vessels also have collateral circulation!) EMT & Paramedic exams often ask about... 📝 The purpose of surfactant (decreases surface tension & keeps the alveoli open) 📝 Where is surfactant secreted? (type II cells) 📝 Where does most gas exchange occur in the lungs? (Alveoli) 📝 Blood that passes through the alveoli but does not undergo gas exchange is referred to as what type of shunt? (Physiologic shunt. This is normal, not every drop of blood that goes through the alveoli gets to participate in the game of gas exchange!) #ems #paramedic #paramedicstudent #nremt #emtlife
