Body Fluids and Circulation MCQ practice test for NEET Biology, based on NEET syllabus Unit 5 (Human Physiology) and NCERT Class XI. Each set has 15 NEET-pattern MCQs in 15 minutes. Questions cover the composition of blood and plasma, formed elements, ABO and Rh blood groups, coagulation of blood, lymph and its functions, open and closed circulatory systems, the structure of the human heart and blood vessels, the cardiac cycle, cardiac output, ECG, double circulation, regulation of cardiac activity, and disorders such as hypertension, coronary artery disease, angina and heart failure. Previous-year NEET questions are mixed with new questions.