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As per your syllabus, Biology Ch 5, how many CHAMBERS does the human heart have?

AThree chambers
BFour chambers — 2 atria (upper) + 2 ventricles (lower)
CTwo chambers only
DSix chambers
Answer & Solution
Correct answer: B. Four chambers — 2 atria (upper) + 2 ventricles (lower)
As per your syllabus, Fig 5.10, human heart has 4 chambers (2 atria + 2 ventricles). Fish has 2; amphibians/most reptiles have 3.
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