In the attached video, You will find an illustrative understanding of White blood cells, their origin, functions, etc. Wbcs are immunity cells of the body which protect the body from invading pathogens. This video will give sufficient knowledge about the defence cells of the body. TIMELINE: 0:00 Objectives 0:23 Functions of Wbcs 0:54 types of Wbcs 1:42 Characteristics of Wbcs 2:30 Lineage of Wbcs 3:22 where to find Wbcs 3:52 Blood system 5:23 Conditions related to abnormal Wbcs 6:45 Percentile of Wcs in blood 8:19 Normal Wbcs count 8:28 Normal RBCs count 8:36 Leukopenia 8:42 Leukocytosis 8:45 classification of Wbcs 9:18 Agranulocytosis