EXCHANGE
AND
TRANSPORT
IN ANIMALS
, Single and • Exchange system: to allow useful substa
into the body and to allow waste substan
double out
• Transport system: to transport substance
circulatory around the body
system
AND
TRANSPORT
IN ANIMALS
, Single and • Exchange system: to allow useful substa
into the body and to allow waste substan
double out
• Transport system: to transport substance
circulatory around the body
system