lungs Flashcards
Lung tissue is highly _____
Elastic!!
what is lung tissue mostly made up of?
Alveoli and bronchioles which contain smooth muscle and specialized epithilium
Broncholies are mostly what to provide rigidity to airways?
Bronchioloes are mostly CARILAGINOUS to provide rigidity to airways
What cells are large bronchioles composed of?
Ciliated simple columer cells
What cells are small bronchioles composed of?
Simple cubodial cells
What are present in ALL bronchioles?
Goblet cells and seromucous glands to create mucus in order to help capture foreign material in airway
The smooth muscle in bronchioles can help with contriction and relaxation. What does consttricting help with and what does relaxation help with?
Constriction helps get air OUT of lungs
relaxation helps get air INTO the lungs
What are Alveoli composed of?
*what cell
Simple squamous epitheal cells
Macrophages:
Present in alveloi to help engulf harmful substances
Right Lung
contains 3 lobes that are seperated by a horizontal fissure and oblique fissure
Left lung
contains 2 lobes that are seperated by an oblique fissure. Also contains the cardiac notch
Each lung has its OWN air supply supply via the bronchioles
true!
Each lung is seperates by a double-walled sac called ______.
*what are its main purposes?
Pleurae.
Main functions:
-Create an air tight seal around lungs
- decrease friction between lungs and rib cage
Visceral pleurae:
Parietal Pleurae:
Visceral pleurae: inner wall, covers lungs
Parietal Pleurae: outer wall, sticks to ribs
Pleaural cavity:
space inbetween each membrane that has SEROUS fluid that helps with adhesion of lungs to thoracic wall
