(a) Name the red pigment which carries oxygen in the blood.
(b) Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
(c) How many chambers are there in the heart of (i) an amphibian, (ii) a mammal, and (iii) a fish?
(d) Describe the circulatory system in a fish.
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( a ) Hemoglobin is the red blood which carries Oxygen in the blood.
( b ) bcoz this makes their circulatory system is more efficient and helps in maintaining body temperature.
( c ) (i) an amphibians have three Chambers,(ii) a mammals have four chambers,(iii) a fish have two chambers.
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