structure of lungs Flashcards
1
Q
passage of air
A
nose pharynx larynx trachea bronchi bronchioles alveoli
2
Q
diffusion
A
movement of gas molecules from a an area of high concentration or PP to an area of low concentration or PP
3
Q
gaseous exchange
A
movement of oxygen from the air into the blood and carbon dioxide from blood into the air
4
Q
what are alveoli responsible for
A
the exchange of gases between the lungs and blood which occurs via diffusion
5
Q
structure of alveoli that aid diffusion
A
wall one cell thick - short diffusion pathway
lots of capillaries - excellent blood supply
large surface area - allows for greater uptake of oxygen
6
Q
pulmonary pleura
A
membrane covering the lungs
- secrets pleural fluid reducing friction between lung tissue and ribs
- lines thoracic cavity, middle wall and diaphragm
7
Q
pulmonary ventilation
A
move air in and out of lungs
