Pedagogy of Biological Science (Part II ) Circulation in animals, Pedagogy of Biological Science, B.Ed., II Year, Pedagogy, X science, Samacheer kalvi science, Biology, blood, Red blood corpuscles, White blood corpuscles (WBC) or Leucocytes, Blood platelets or Thrombocytes, Blood Vessels - Arteries and Veins, Differences between Artery and Vein, Functions of blood, Types of Circulatory System, Structure of Human Heart, Types of Blood Circulation, Heart Beat, Cardiac Cycle, Heart Sound, Blood pressure, Stethoscope, Sphygmomanometer, Blood donation, blood groups, Distribution of Antigen (RBC) and Antibody (Plasma) in different Blood Groups, Lymphatic System, Functions of Lymph