Arrange the events which happen in the
circulatory system in the correct order.
(a) The heart pumps the blood to the lungs.
(b) Blood carrying CO2 enters the heart through
veins.
(c) The heart pumps the oxygenated blood to all
body parts of the body through arteries.
(d) Blood absorbs 0, from the lungs and goback
to the heart.
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Answer:
'b' then 'a' then 'c' then 'd'
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