It affects the bronchi.
They are called Alveoli.
the blood surround Alveoli in order to gas exchange between the Alveoli and red blood cell.
Alveoli are found within the lungs. The alveoli act as a specialised gaseous exchange surface in mammals. Another function of alveoli is the production of surfactant.
In the alveoli
The humorus
These are called the alveoli capillaries.
your lungs have structures called alveoli. The alveoli are surrounded by capillary beds which carry blood. The oxygen enters the alveoli when you inhale. The oxygen then diffuses from high concentration in your alveoli to low concentration the blood in the capillaries surrounding the alveoli.
Oxygen passes into the capillaries that surround the alveoli. The thin walls of the capillaries make this diffusion easier.
Alveoli.
The tiny blood vessels that surround the alveoli arecalled alveolar capillaries
Oxygen diffuses from the alveoli into the capillaries, where it binds to hemoglobin in red blood cells for transport to tissues. Carbon dioxide diffuses from the capillaries into the alveoli and is exhaled from the body.
It is very important that they cover you alveoli