What does “Double circulation” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
blood passes through the heart twice in one cycle -- a pulmonary circuit (heart-lungs) and a systemic circuit (heart-body).
In simple words: blood passes through the heart twice in one cycle -- a pulmonary circuit (heart-lungs) and a systemic circuit (heart-body). Getting Double circulation clear matters because NEET questions on Body Fluids and Circulation usually test this idea directly, not just a formula you memorised.
Key point
Double circulation
Common mistake
thinking human circulation is single like a fish's.
Memory tip
two circuits keep oxygenated and deoxygenated blood from mixing.
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