Hematology (Haematology) is the science that deals with the different components of blood and their disorders.

1. Hematology
Introduction
Prepared by
Mr.Hewa

2. Hematology
Hematology (Haematology) is the science
that deals with the different components of
blood and their disorders.

3. Blood
Blood is the red fluid that runs in blood vessels.
• Normal adult body contains 4-6 liters of blood
(Av. 5 L)
• Bright red in arteries
(Oxygenated)
• Dark red in veins
(Deoxygenated)

4. Physical Characters of Blood

7. Composition of Blood
• Plasma: ~55%
• Red Blood Cells
(RBC, Erythrocytes):~45%
• White Blood Cells
(WBC, Leukocytes)+
• Platelets
(Thrombocytes):~1%

8. Composition of Blood

11. Plasma

15. Blood Cells
Compose 45% of blood (hematocrit (Hct.))
– Erythrocytes (RBCs)
– Leukocytes (WBCs):
• Neutrophils
• Basophils
• Eosinophils
• Monocytes
• Lymphocytes
– Thrombocytes (Platelets)

16. RED BLOOD CELLS

17. Red Blood Cells (Erythrocytes)
Most numerous blood cells
• Count: 4-6 millions cells/µL
• Shape :Biconcave in shape
• Life span: ~120 days
• No nucleus
• Contain hemoglobin
• Function :
Transport O2 and CO2
to and from tissues

19. White Blood Cells(Leukocytes)
• Count: 4,000 – 11,000 cells/µL
• Life span differ between different types of
WBCs, however, it ranges from hours to months.
• Function in protecting the body against
foreign substances and pathogens such as
bacteria, viruses, etc.

20. White Blood Cells(Leukocytes)
• Granulocytes
– Neutrophils
– Eosinophils
– Basophils
• Agranulocytes
– Monocytes
– Lymphocytes:
• T-lymphocytes
• B-lymphocytes

22. Platelets (Thrombocytes)
Are Fragments of cells
• Derived
from Megakaryocyte cells in
bone marrow
• Count: 150,000 – 400,000/µL
• Life span: 5-9 days
• Function:
clot (platelet plug)
formation to stop
bleeding

26. Thank you