humans Flashcards
(25 cards)
GO OVER MEDICAL LABELLING GAL
real slay
what happens in nasal cavity
warmed and moistened
why are bronchioles different
less cartilage and do not have mucous glands
what shape are cartillage rings on trachea
C
why are cartillage rings in a specific shape
open end at the back allows for expansion when eating food but stops trachea from collapsing
how are bronchi strenghtened
forms plates within the smooth muscle layer to stenghten the tubes
what does mucous membrane consist of
ciliated and goblet cells
what do goblet cells do
secrete mucous
function of epiglottis
seals the air passage of the trachea when food is swallowed preventing entry into trachea
closes oesophagus while breathing
lungs function
respiration organ
trachea function
carry the respiratory medium to the lungs
bronchi function
splits the trachea into the 2 lungs
bronchioles function
branches out to carry the respiratory medium to the alveoli
alveoli function
site of gas exchange
pleaural membranes function
lubricate the lungs when the rib cage moves
ribs function
protect the lungs and heart and work as a part of the ventilating mechanism
intercoastal muscle function
contract and relax to move rib cage
diaphragm function
contract and relax a part of the ventilating mechanism
how does decreasing pressure in the lung happen
1 - ribs move up and out because outer intercoastal muscles contract and inner intercoastal muscles relaxes
2 - diaphragm contacts and flattens
what is breathing
ventilation mechanism
what are the 6 things you need to talk about with breathing
- intercoastal muscle
- rib cage
- diaphragm
- thorax volume
- thoratic pressure
- atmospheric pressure
inhaling
- intercoastal muscle
- rib cage
- diaphragm
- thorax volume
- thoratic pressure
- atmospheric pressure
contract
up and out
contract and flatten
increase
decrease
higher so air moves in
exhaling
- intercoastal muscle
- rib cage
- diaphragm
- thorax volume
- thoratic pressure
- atmospheric pressure
relax
in and down
relax and dome
decrease
increase
lower so air moves out
what is the gas exchange surface in mammals
alveoli
