03 September
Bilingual TNPSC Biology notes on the human circulatory system — four-chambered heart, valves, SA node, double circulation, blood composition, RBC/WBC/platelets, clotting, and ABO & Rh blood groups. With 15 key points, detailed notes in English and Tamil, 5 practice MCQs, memory tips and previous year questions for TNPSC Group 1, 2, 2A, 4 and VAO.