Summary Gas exchange a level dump

s
exchange
fish humans
9shoppers -


oesophagus
&

·
i
spiracies buccal
7
-
~
N




2
cirsac
[



7 -


i
⑫
①
C-
o 00

Lugy
o
7 I




&
&




o
-
< trachea
cartilage rings
y
·




I ""in
T
trachea - 1I



mouth
T

Ispiral of &
gilamea
&


I

Chitin) opecculum


·
air enters via spericles
,
·
water
flap

goes
in via mouth
Intercostal
·
muscles +
↑ moist Scapiliary
goes down trachea which buccal diaphragm contract

branches into tracheoles cavity floor lowers decreasing the increasing thorasic volume
,
.


pressure, water rushes into decreasing the pressure so
the insect moves , air air the
as rushes into lungs.
·




the mouth
, opecculum closed
sacs are compressed ·

gas exchange in the
pushing ·




gas exchange
e
gill fillaments
,
alveoli

air
throughout the inter cost musc. e
diaphragm
·




system
.




to the opecculum opens + water rushes relax
allowing the air to
ends of the trachele flow out of the
where out of the mouth
gas exchange occurs
.
·
ends have counter-current flow
a small amount




X
-


of water. a


active > water
-




cells
moves into
Cae -

·moreScota
into the
respiring
tissue