B2 Respitory System
Which organ system are the lungs part of
Respitory system
Which structures connect the bronchi to the alveoli?
Bronchioles
What are the tiny air sacs in the lungs called
Alveoli
What is the name of the process by which oxygen moves through the wall of the alveoli, into the blood?
Diffusion
How are alveoli adapted for efficient gas exchange
! Their walls are only one cell thick
which provides a short distance for diffusion
! There are many of them giving a large total surface area
! They are moist, which allows the gases to dissolve, and therefore diffuse more easily
Which gas diffuses from the blood in the capillaries, into the air in the alveoli
Carbon dioxide
Which substance inside red blood cells does oxygen bind to
Haemoglobins