Biology Respiration Summary

transport of via blood
gaseous exchange gases
1. Oxygen small % dissolves here

-
not very soluble f
-
occurs externally ( lungs
& blood ) and internally ( blood & -

1,5% transported in blood plasma
tissues )

-

98,5% diffuses into red blood cells & binds with

7
haemoglobin
PULMONARY at " 4 Oxygen molecules bind to form oxy haemoglobin
-




capillary way
.




ARTERY

deoxygenated
blood | | " "÷.
blood

• PULMONARY Hb t 402 9 Hb .
402
VEIN
alveolus
wall 2. carbon dioxide
than
more soluble Oz
-




5% of transported blood plasma
coz by
-




moist ^
Red blood
Wall corpuscle
enters red blood cells
-
most coz
-

30% of
coz binds
the with haemoglobin to form
carb amino
haemoglobin


externalgase0Usexchange_
-

blood in capillaries is deoxygenated Hbtcoz SHb.CO ,
-
contains a low concentration of oxygen & high
concentration of
coz
-
65% Of
CO2 dissolves in plasma ( cytoplasm ) of

the red blood cells to form bicarbonate ions .




-

inhaled air in


concentration
alveoli has

of
a
high concentration of
Oz
diffuse from
§ blood
& Low coz the red
cells & are then transported
by the blood plasma

high low
-
too
concentration
in blood & the blood in the
Oz diffuses
coz from
-




capillaries ,




capillaries of

the body I * haemo =
iron



internalgaseousexchanges
blood via the
the that reaches the cells
capillary
-




blood vessels has a higher concentration of Oz
than the cells



in cells have a higher coz concentration
-


their turn the

than the blood



-
the gases move along a diffusion gradient
Oz to cells
°




to blood
coz
•