Blood Lecture 1 / Ch 6 White blood cells Flashcards
Leukocytes
• Identify and attack foreign
material (Antigens)
All WBC originate from ?
stem Cells in Hematopoietic bone marrow
Most WBC circulate within?
vascular and lymphatic systems
Number of WBC
4,500 - 11,000 WBC / μL
higher at birth
15,000-25,000
Leukocytosis
increased WBC count
- classic sign of infection
- sign of leukemia
Leukopenia
decreased WBC count
4,500 WBC / μL
– Caused by decreased production (chemo or
radiation therapy)
or increased destruction
(hypersplenism)
Types of WBC
- Granulocytes
- Monocytes AKA: Macrophage
- Lymphocytes
Granulocytes
- Neutrophils
- Eosinophils
- Basophils
Monocytes
- Released from the bone marrow
- Removes dead and damaged cells.
- becomes Macrophage or Histocyte
- Monocyte Exists 1-2 days in circulation
Lymphocytes
T cells and B cells
Chemotaxis
WBC respond to chemical stimuli (cytokines) using the concentration of the stimuli
to direct its movement to the site of inflammation
Diapedesis
Movement through capillary pores into body tissue
Pluripotential Stem Cell >
Myeloid & Lymphoid
Vast quantities of _____ _____ reside in the bone marrow as a reserve
immature granulcytes
Contain numerous granules in their cytoplasm which contain digestive enzymes.
Granulocytes