Body Fluids and Circulation - NEET Previous Year Questions with Complete Solutions
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Here you will find Complete Body Fluids and Circulation NEET Previous Year Questions with detailed solutions.
Get complete NEET previous-year questions for Physics, Chemistry, and Biology.
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Frequently Asked Questions
Find answers to common questions.
Is Body Fluids and Circulation in Class 11 or Class 12 NEET syllabus?
Body Fluids and Circulation is a Class 11 chapter (Chapter 18, NCERT Biology Part II). It is included in the NTA NEET-UG Biology syllabus under the unit "Human Physiology." As per the revised NEET syllabus issued by NTA, this chapter remains fully examinable for NEET 2025 and NEET 2026.
Which topics from Body Fluids and Circulation are most important for NEET?
The most tested topics are: (1) cardiac cycle and heart sounds, (2) ECG waveform — P wave, QRS, T wave, (3) blood composition and plasma proteins, (4) ABO blood group system and Rh factor, and (5) lymph composition vs. plasma. These five areas cover approximately 70–75% of all questions asked from this chapter since 2013.
How many questions come from Body Fluids and Circulation in NEET?
On average, 2–3 questions appear from Body Fluids and Circulation in NEET-UG every year. In NEET 2021, the count rose to 4 questions. Based on NTA's question distribution since 2017, this chapter contributes roughly 8–12 marks across any 3-year preparation window, making it a reliable scoring chapter
Can I score full marks in Body Fluids and Circulation by solving only PYQs?
PYQs are necessary but not fully sufficient. Since NEET examiners sometimes introduce new application-level questions, pair PYQ practice with a thorough reading of the NCERT chapter. A reliable approach used by eSaral students: read NCERT → solve chapter test → solve 10 years of PYQs → revise flagged errors. This 4-step cycle typically takes 6–8 hours total for this chapter.
What is the difference between lymph and blood plasma in NEET Biology?
Lymph is essentially filtered blood plasma that has leaked out of capillaries into the interstitial spaces and returned via lymphatic vessels. The key differences NEET tests: lymph lacks RBCs, contains fewer proteins than plasma, and has a higher fat content after meals (due to lacteals absorbing dietary fats). Lymph also carries lymphocytes and plays a vital role in immunity.
What is the cardiac cycle duration and why does NEET ask about it?
The cardiac cycle lasts 0.8 seconds at a resting heart rate of 75 beats/minute. NEET tests this because it connects directly to cardiac output calculations and the relative duration of systole vs. diastole. Ventricular systole = 0.3 s, atrial systole = 0.1 s, and joint diastole = 0.4 s — remember these numbers as they appear in calculation-based MCQs.