पेशीय तंत्र Muscular system। Valuntry and Unvoluntry muscular। Cardiac। Bihari sir gs official। 

पेशीय तंत्र Muscular system। Valuntry and Unvoluntry muscular। Cardiac। Bihari sir gs official।
#mascular_system
#voluntry_unvoluntry_muscular
#cardiac
#bihari_sir_gs_official
#biology_by_bihari_sir
#biology_gk
#ssc #upsc #cartilage #bones #human_body #human_skeleton #ias #skeleton_system #important_questions