Formed Elements

neutrophils

bacteria, defensins, chronic illnesses

some contain hydrolytic enzymes and are regarded as lysosomes

eosinophils

lysosome-like, but lack enzymes that specifically digest bacteria

counterattack against parasitic worms that are too large to be phagocytized

have complex roles in other diseases including allergies and asthma

basophils

cytoplasm contains large, coarse, histamine-containing granules

lymphocytes

vital for immunity

T and B cells

monocytes

differentiate into highly mobile macrophages

phagocytic and are crucial in the body’s defense against viruses, certain intracellular bacterial parasites, and chronic infections such as tuberculosis

platelets

aid in forming a temporary plug in blood clotting

red blood cells

transport O2 and CO2

eosinophil

1

lymphocyte

2

monocyte

3

platelet

4

neutrophils

5

erythrocytes

6