Blood

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Blood

White Blood Cells (Leukocytes)

Granulocytes

Basophils

Contain heparin, an anticoagulent

Release histamine and other mediators of inflammation

Large purplish-black cytoplasmic granules

Eosinophils

Play a complex role in allergy and asthma

Kill parasitic worms

Red cytoplasmic granules

Bilobed nucleus

Neutrophils

Phagocytize bacteria

Pale red and blue cytoplasmic granules

Multilobed nucleus

Agranulocytes

Lymphocytes

Immunological processes: a) direct cell attack b) antibodies

Thin rim of pale blue cytoplasm

Spherical or indented nucleus

Monocytes

Develop into macrophages (eat cellular debris and microscopic foreign bodies in tissues)

Gray-blue cytoplasm

Kidney-shaped nucleus

Fight infections.

Less than red blood cells.

Larger than red blood cells.

Have nuclei.

Red Blood Cells (Erythrocytes)

Transport oxygen.

Contain hemoglobin.

Produced in red bone marrow.

Double concave shape.

increases surface area to volume proportion

Do not have nuclei.

Platelets

Blood clotting, specifically at the site of tissue injury.

Smaller than red blood cells.

Plasma

Function

Carries fibrinogen to help with blood clotting.

Carries antibodies to fight infections

To dissolve and transport nutrients, wastes, water and CO2.

Structure

92% water, with different salts and proteins.