Chapter 42

Circulation and Gas Exchange

Understand how animals transport gases and nutrients. Master circulation and respiration - high-yield for all biology exams.

10 Hours

Olympiad 5/5

Advanced

NEETRequired

MCATRequired

AP BiologyRequired

IB BiologyRequired

USABO

5/5

BBO

5/5

INBO

5/5

IBO

5/5

Key Topics Covered

Circulatory system types

Heart structure and function

Blood vessels and pressure

Gas exchange mechanisms

Respiratory adaptations

Compare open and closed circulatory systems

Explain cardiac cycle and ECG

Describe gas exchange mechanisms

Understand oxygen transport

Critical! Body Fluids and Circulation is one of the highest-weightage chapters in NEET with 8-10% questions.

Olympiads test ECG interpretation, blood pressure regulation, diving physiology, and comparative circulation.

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