This document summarizes the components and functions of human blood. It discusses the three main cellular components - red blood cells, white blood cells, and platelets. Red blood cells are described as biconcave discs that contain hemoglobin and lack a nucleus. Their main function is to transport oxygen from the lungs to tissues and assist with carbon dioxide removal. The production of new red blood cells occurs through erythropoiesis in the red bone marrow. Possible deficiencies or abnormalities in red blood cell levels, such as anemia or polycythemia, are also mentioned.

1. Prepared by,
RESHMA. M.S.
B.Ed. Natural Science
Candidate Code: 18114386012
St. Thomas Training College
Mukkolakkal
Thiruvananthapuram

2. Blood vessel
Red blood
cell
platelet
Plasma
White blood cell

3. 1. Red Blood Cells
2. White Blood Cells
3. Platelets

5.  Red blood cells are biconcave discs
erythrocytes

6.  Shape - a biconcave disc
with large surface area
 Can change shape
 No Nucleus / organelles
 Contains hemoglobin
 Short Life Span (~120
days)

7.  Haemoglobin is the protein molecule
that makes up 95% of a red cell.
 The red colour of blood is primarily
due to oxygenated red cells.
 Primary Function = Transport oxygen
from the lungs to the cells of the body
& assist with CO2 removal

8.  Molecules of haemoglobin account for
95% of the proteins in RBCs
 Haemoglobin is a gas transporting
protein molecule

10.  Erythropoeisis = the formation of new red
blood cells
 Occurs in red bone marrow

11. FUNCTION OF RED BLOOD CELLS

13.  Anaemia – deficiency in Red Blood Cells
 Polycythemia - abnormally high number
of RBC’s in circulation

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