Body Fluids and Circulation — NEET/JEE Questions, Notes & Weightage
Class 11 Human Physiology NEET weightage: Very High 2,658 questions
Covers blood composition, blood groups, the heart (structure, cardiac cycle, ECG), and the lymphatic system. The cardiac cycle sequence and ECG-wave identification (P, QRS, T) are among the most consistently tested topics in all of NEET Biology.
Practice all 2,658 Body Fluids and Circulation questions →Topics inside Body Fluids and Circulation
blood
940
Circulatory Pathways
763
Double Circulation
336
Lymph (Tissue Fluid)
258
Disorders of Circulatory System
195
Electrocardiogram
171
Regulation Of Cardiac Activity
68
Cardiac Cycle
1
Frequently asked questions
What is the single highest-yield topic in this chapter?
The cardiac cycle (systole/diastole sequence, timing, and associated heart sounds) combined with ECG wave identification — together these recur in nearly every NEET paper.
Are blood group / blood clotting questions common?
Yes, especially ABO and Rh blood grouping (compatibility, antigens/antibodies) and the basic clotting-factor cascade sequence.
Should I memorise exact cardiac cycle timings?
Knowing the relative duration of systole vs diastole and total cycle time (~0.8s) is worth memorising precisely, since NEET has asked numeric/timing-based questions on this directly.