Question

What is excreation ? how are oxygen and carbon dioxide transported in human beings?

Answer 1

the waste of body remove from the body is called excretion.
by blood
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Answer 2

♥ Transport of oxygen - Haemoglobin present in the blood takes up the oxygen from the air in the lungs . It carries the oxygen to tissues which are deficient in oxygen before releasing it .

♥ Transport of carbon dioxide - Carbon

dioxide is more soluble in water .

Therefore , it is mostly transported from

body tissues in the dissolved form in our

blood plasma to lungs . It diffuses from

blood to air in the lungs .