2. Hemo: Referring to blood
cells
Poiesis: “The development or production of”
The word Hemopoiesis refers to the production &
development of all the blood cells:
Erythrocytes: Erythropoiesis
Leucocytes: Leucopoiesis
Hematopioesis
3. First trimester of pregnancy : Yolk sac
Second trimester : liver.
3rd trimester : Red bone marrow
of all bones
Adults : Red bone marrow
in flat bones
(vertebrae,sternum,iliac
Sites
4.
5. Mean: (Thrombo- + -cyte, "blood clot cell")
Function: clotting factor
Diameter: 2 – 3 µm
Life Span: 8 to 9 days
Count: 150,000 to 400,000 per cubic millimeter
Thrombocytes
6. Erythrocytes
Mean: (Erythro- + -cyte, "red-blood cell”)
Function: O2, CO2 and PH
Diameter: 7.8 micrometers
Life Span: 100 – 120 days
Count: Male: 4.5 to 6.3, Female: 4.2 to 5.5
7. Leucocytes
Mean: (Leco- + -cyte, "white-blood cell”)
Function: cells of the immune system
Diameter: 12 - 17 μm
Life Span: 5 - 21 Day
Count: 4,000 – 11,000 WBCs per microliter of blood
8.
9. Neutrophil
Approx. %
in adults See
also:
Blood values
Diameter (μm) Main targets Nucleus Granules Lifetime
62% 10 – 12
• Bacteria
• Fungi
Multilobed
Fine, faintly pink
(H&E stain)
6 hours – few days
(days in spleen and
other tissue)
10. Eosinophil
Approx. %
in adults See
also:
Blood values
Diameter (μm) Main targets Nucleus Granules Lifetime
2.3% 10 – 12
• Larger
parasites
• Modulate
allergic
inflammatory
responses
Bi-lobed
Full of pink-orange
(H&E stain)
8 – 12 days
(circulate for 4 – 5
hours)
11. Basophil
Approx. %
in adults See
also:
Blood values
Diameter (μm) Main targets Nucleus Granules Lifetime
0.4% 12 – 15
Release
histamine for
inflammatory
responses
Bi-lobed or tri-
lobed
Large blue
A few hours to a few
days
12. Monocyte
Approx. %
in adults See
also:
Blood values
Diameter (μm) Main targets Nucleus Granules Lifetime
5.3% 15 – 30
Monocytes migrate from the
bloodstream to other tissues
and differentiate into tissue
resident macrophages,
Kupffer cells in the liver.
Kidney shaped None Hours to days
