WELCOME

SREE NARAYANA TRAINING COLLEGE

SREEKANDESWARAM, POOCHAKKAL

B.Ed 2013-2014 KERALA UNIVERSITY

SUBMITTED BY, ANUSREE.C NATURAL SCIENCE REG.NO:(181)13383002

SUBMITTED TO, Smt.SOYA.P LECTURER Dept.of Natural

Science

SNTC, Poochakkal

POWER POINT PRESENTATION ON

BLOOD CELLS

INTRODUCTIONThe average human adult has more than 5

liters of blood in his/her body.Blood carries O2 and nutrients to living cells and takes away their waste products.Through the circulatory system , blood adapts to the body’s need.

Blood contains liquid plasma and blood cells.Blood cells are formed in the bone marrow.All blood cells arise from the same bone marrow stem cells.

The immortal,undifferentiated,pluripotent stem cellsgive rise to Erythrocytes(RBCs),Leukocytes(WBCs), and Platelets.

ERYTHROCYTES(RBC) Also known as red blood cells. The most numerous type in the blood. Function to transport of O2 in the blood. The shape of RBC is ideal for this function Seen from the top ,RBC appear to be circular,but

a side view shows that they are actually biconcaved discs.

This shape increase surface area –to-volume ratio of the cell,thus increasing the efficiency of diffusion of O2 & CO2 in and out of the cell.

RBCs also have a flexible plasma membrane RBCs contain tremendous amount of

haemoglobin,the protein that binds O2. They have a limited limited life span of about

120 days. RBCs are produced through a process under

erythropoesis.

RBC

LEUCOCYTES(WBC) WBCs protect the body from infection. They are much fewer in number than red

blood cells, accounting for about 1% of our blood.

The most common WBC is the Neutrophil. There are several different types of white

blood cells Neutrophil , Eosenophil , Basophil , Lymphocyte , Monocyte.

WBC

PLATELETS Unlike RBC and WBC , platelets are not

actually cells but rather small fragments of cells .

It helps the blood clotting process or coagulation by gathering at the site of an injury , sticking to the lining of the injured blood vessel , and forming a platform on which blood coagulation can occur

This results in the formation of a fibrin clot , which covers the wound and prevents blood from leaking out .

THANK YOU