Leukocytes major features

Neutrophils Nucleus Shape

Multi-lobed

Neutrophils Granular

Yes

Neutrophils Function

Phagocytize bacteria

Neutrophils Abundance (NLMEB)

Most abundant

Lymphocytes Granular

No

Lymphocytes Nucleus Shape

Large round nucleus

Lymphocytes Function

Specific immunity, produce antibodies

Lymphocytes Abundance (NLMEB)

2nd most

Monocytes Granular

No

Monocytes Nucleus Shape

Kidney/horseshoe shape

Monocytes Function

Phagocytize pathogens/debris in tissues (macrophages)

Monocytes Abundance (NLMEB)

3rd

Eosinophils Granular

Yes

Eosinophils Nucleus Shape

Bilobed

Eosinophils Function

Attack parasitic worms; involved in allergies

Eosinophils Abundance (NLMEB)

4th

Basophils Granular

Yes

Basophils Nucleus Shape

Lobed

Basophils Function

Release histamine/heparin (allergic reactions)

Basophils Abundance (NLMEB)

Least abundant