What structure marks the division between the upper and lower respiratory system?
The larynx is the beginning of the lower respiratory system
Explain the difference between Type I and Type II alveolar cells and why each is essential.
Type I cells: Simple squamous, main site of gas exchange. Type II cells: Produce surfactant, lowering surface tension and preventing collapse
Describe the role of surfactant and what happens when it is absent.
Surfactant reduces surface tension in alveoli, keeping them open and easy to inflate. Without it alveoli collapse- premies, respiratory distress syndrome
Unlock this slideshow and over 4 million more with Baamboozle+