Blood components and its function

2. PRESENTED BY
ARATHY S NAIR

3.  The average human has 5 litres of blood.
 Connective fluid tissue.
 It carries vital substance to all parts of the
body.
 Blood is a complex connective tissue in which livin
g cells ,the formed elements are suspended in the non li
ving fluid called plasma.

4. Plasma
Formed Elements
-RBC (Erythrocytes)
-WBC (Leukocytes)
-Platelets (Thrombocytes)

6. 1) Plasma
2) The Formed Elements
(blood cells)
Composition of the Blood

7. General Properties of Blood
- Fraction of body weight
- Volume
- temperature
- pH 7.35 - 7.45
8%
Female: 4-5 L
Male: 5-6 L
38 C (100.4 F)
-Hemoglobin
Female: 12-16 g/100 ml
male: 13-18 g/100 ml

8. Water 92% by weight
Proteins Total 6-9 g/100 ml
Albumin 60% of total plasma protein
Globulin 36% of total plasma protein
Fibrinogen 4% of total plasma protein
Glucose 70-110 mg/100 ml
Amino acid 33-51 mg/100 ml
Lactic acid 6-16 mg/100 ml
Composition of Plasma

9. Formed elements include:
Erythrocytes (red blood cells, RBCs)
Platelets (cellular fragments)
Leukocytes (white blood cells, WBCs)
Granulocytes
Agranulocytes
Neutrophils
Eosinophils
Basophils
Lymphocytes
Monocytes

12. Appearance:
- biconcave disc shape, which is suited for gas exchang
e. The shape is flexible so that RBCs can pass though the
smallest blood vessels, i.e., capillaries.

13. ERYTHROCYTES (RED BLOOD CELLS, RBCS)
Structure:
-Primary cell content is hemoglobin, the protein that bin
ds oxygen and carbon dioxide.
- no nucleus nor mitochondria

14. 1) Primary Function
Transport oxygen from the lung to tissue cell
s
and carbon dioxide from tissue cells to the lu
ng
Functions of Erythrocytes
2) Buffer blood pH

15. Leukocytes are grouped into two major categories:
Granulocytes
- contain specialized membrane-bound cytoplasmic granules
- include neutrophils, eosinophils, and basophils.
Agranulocytes
- lack obvious granules
- include lymphocytes and monocytes

16. Function of Leukocytes:
Defense against diseases
Leukocytes form a mobile army that hel
ps protect the body from damage by bac
teria, viruses, parasites, toxins and tumo
r cells.

17. Platelets are not cells but cytoplasmic fragments of
extraordinarily large (up to 60 m in diameter) cell
called megakaryocytes.
Normal Platelet Count: 130,000 – 400,000/l

18. Function of Platelets
1) Secrete vasoconstrictors that cause vascular
spasms in broken vessels
vascular spasms

19. FUCTIONS OF BLOOD
Blood transports the following substances: Gases,
namely oxygen (O2) & carbon dioxide (CO2), b/w the
lungs and rest of the body.
Nutrients from the digestive tract and storage sites
to the rest of the body.
Regulate Body Temperature

20. Blood is a combination of plasma and cells that circulate
through the entire body.
Blood transports oxygen and nutrients around the body and
removes cellular waste, among a range of other vital functions
Plasma makes up 55 percent of blood content.
The other 45 percent consists mainly of red blood cells and
platelets