anaphy blood

Granulocytes

Granules in their cytoplasm can be stained

Possess lobed nuclei

Include neutrophils, eosinophils, and basophils

Agranulocytes

Lack visible cytoplasmic granules

Nuclei are spherical, oval, or kidney-shaped

Include lymphocytes and monocytes

Neutrophils

Most numerous WBC

Multilobed nucleus

Cytoplasm stains pink and contains fine granules

Function as phagocytes at active sites of infection

Numbers increase during infection

3,000–7,000 _________ per mm3 of blood (40–70 percent of WBCs)

Eosinophils

Nucleus stains blue-red

Brick-red cytoplasmic granules

Function is to kill parasitic worms and play a role in allergy attacks

100–400 __________ per mm3 of blood (1–4 percent of WBCs)

Basophils

Rarest of the WBCs

Large histamine-containing granules that stain dark blue

Contain heparin (anticoagulant)

20–50 ___________ per mm3 of blood (0–1 percent of WBCs)

Lymphocytes

Large, dark purple nucleus

Slightly larger than RBCs

Reside in lymphatic tissues

Play a role in immune response

1,500–3,000 _________ per mm3 of blood (20–45 percent of WBCs)

Monocytes

Largest of the white blood cells

Distinctive U- or kidney-shaped nucleus

Function as macrophages when they migrate into tissues

Important in fighting chronic infection

100–700 ________ per mm3 of blood (4–8 percent of WBCs)

Platelets

Fragments of megakaryocytes (multinucleate cells)

Needed for the clotting process

Normal platelet count is 300,000 _________ per mm3 of blood

Colony stimulating factors (CSFs) and interleukins

prompt bone marrow to

generate leukocytes

Hematopoisis

Process of blood cell formation

Hemostasis

process of stopping the bleeding that results from a break in a Blood vessel

3 to 6 minutes

Blood usually clots within