Diffusion Flashcards
What is diffusion?
The movement of particles from an area of high concentration to low concentration.
How does diffusion play a role in gas exchange?
Oxygen diffuses into blood, and carbon dioxide diffuses out at the alveoli.
Why is diffusion important in the circulatory system?
It allows oxygen and nutrients to move from blood into cells.
Where does diffusion occur between the respiratory and circulatory systems?
At the alveoli and capillaries in the lungs.
How does the structure of alveoli help diffusion?
Thin walls and close contact with capillaries make diffusion efficient.
What gradient drives diffusion in the lungs?
The concentration gradient of gases (oxygen and carbon dioxide).
Which body system relies on diffusion to absorb nutrients?
The digestive system (in the small intestine).
What is exchanged through diffusion in body tissues?
Oxygen, carbon dioxide, and nutrients.
What happens when diffusion is impaired in the lungs?
Gas exchange is less efficient, leading to low oxygen levels in the blood.
How do circulatory and respiratory systems work together for diffusion?
The respiratory system provides oxygen, and the circulatory system delivers it via diffusion at tissues.
