respiratory system Flashcards
1
Q
what happens to the body during inspiration?
A
. external intercostal muscles contract
. ribs are pulled upwards and outwards increasing volume
. diaphragm contracts
2
Q
what happens to the body during expiration?
A
internal intercostal muscles contract
ribs are pulled downwards and inwards decreasing volume
diaphragm muscles relax
3
Q
role of alveoli
A
site of gas exchange which need support to prevent sacs from collapsing during expiration
