B1 2018 Flashcards
1
Q
Describe the gross structure of the human gas exchange system and how we breathe in and out
A
Trachea, bronchi, bronchioles, alveoli
IN
Diaphragm contracts and external intercostal muscles contract
Volume increases and pressure decrease in thoracic cavity
Air moves in
OUT
Diaphragm relaxes and intercostal muscles contract
Volume decrease and pressure increases in thoracic cavity
Air moves out
2
Q
A
