Gas Exchange Flashcards
Journey of the air into the air sacs
Nasal cavity
Soft palate
Trachea
Bronchus
Bronchioles
Alveoli
Def: Diffusion
A substance moves from where there’s lots of it to where there’s less of it
Exchange in the Alveoli
Oxygen from air into blood (red blood cells)
Carbon dioxide from blood into the air
What is the effect of physical exercise on breathing
Rate and depth of breathing increase
Muscles for breathing get stronger
Chest cavity can open up more (more air)
Number of blood vessels and alveoli increase
Three things that impact gas exchange
Exercise
Asthma
Smoking
Three ways in which lungs are well adapted for gas exchange
Moist
Good blood supply
Large surface area because of alveoli
How to breathe in
Diaphragm contracts - lowers the diaphragm
Creates low pressure in the chest cavity
Lungs expand into the cavity and suck in air
How does smoking
Symptoms of asthma attack
Difficulty breezing
Wheezing
Tight chest
