Lung tissue Flashcards
What tissue makes up alveoli
Squamous epithelium
What fibres are in alveolus walls and why
Elastic fibres- stretch during inspiration and recoil to push air out during expiration
What epithelium lines trachea bronchi bronchioles and why
Ciliates epithelium move mucus with may contain pathogens, out of airways and to the top of the mouth to where it can be swallowed
What do goblet cells do and where are they found
Airways, trachea bronchi bronchioles.
Goblet cells produce mucus to trap pathogens, it is then moved out of airways by ciliate epithelium
what muscle makes up the bronchioles
smooth muscle
describe deposition of cartilage in the trachea and what it does
C shaped rings
prevent collapsing during inspiration
the c shape enables flexibility.
what tissue is in the bronchus and trachea.
smooth muscle
elastic fibres
ciliated epithelium
goblet cell
cartilage
what tissue is in a bronchiole
elastic smooth muscle, ciliated epithelium.
how can you distinguish between a bronchiole and a bronchus under a microscope
a bronchus has a huge lumen and pale greyish cartilage.
bronchiole- smaller lumen and no cartilage
describe differences between a low power drawing and a high power drawing
lp- no indvidual cells
- outlines of tissues
hp- individual cells labeled
what are rules when drawing a low power and high power drawing
no arrowheads
no overlapping lines
labels with a ruler
labels must touch the structure you are labelling.
no shading
drawing must be big
smooth muscle is in trachea, bronchi and bronchioles. what does it do
regulating air flow, constricting when less air is needed and dilating when more air is needed.
elastic fibres are in all lung tissue, what does it do
enable alveoli to stretch when they fill with air and recoil to force air out.
how is cartilage deposited in the bronchi
either full rings, or irregular blocks. not c shaped.
do bronchioles contain goblet cells
no
where is the main site of gas exchange in lungs
alveoli
why do aquatic animals may have folds in their skin
to increase surface area; volume ratio and increase oxygen absorption
