Cruicial to body's defense agains pathogens/disease
Transport in blood and lymph
Complete with nucleus and organelles.
Increased number of leukocytes indicated infection
- Formed into 2 major group
- Granulocytes and agranulocytes- (lymphocytes & monocytes)
Lymphocytes- 2nd most numerous leukocyte in blood and vital to immune response
monocytes are largest in size and change into macrophages to fight chronic infection