Composition of the blood:

1.Blood cell: i) solid portion of the blood is called blood cells. ii)Solid portion of the bound is about 40%2. Blood plasma: i) Liquid portion of the blood it is the plasma

blood.ii) Blood plasma contains about 60%3. Total amount of the blood 5 – 8% of the body.

Function of blood circulation• Carry out the O2 from lunch to tissue • Remove CO2 and other waste materials from the tissue • Carry the food materials from digestive tract tissue• Keep the water content of the body stable

Three kinds of blood cell:i) Red blood corpuscles(RBC)ii) White blood corpuscles (WBC)iii) Platelets

Function of Red blood corpuscles (RBC)i) RBC is the largest part of the solid portion of the blood.ii) Incase of cow blood there are approximately 6 million /mmiii) RBC is the soft cell, elustic, and it contains red pigment and

hemoglobin

RBC is very important substance because it carry CO2 and O2 In the blood stream between the tissue and the lungs.

A very important part of hemoglobin is iron and if this is shortage the blood can not carry out its functions properly. This condition is known as “Anaemia”.

Production of cells is a continuous process is called “Spleen”. Normally 1milion cells destroyed in every 1 second.

2. White blood corpuseles (WBC)

i) In the WBC, no hemoglobin. This is the reason the WBC is the colorless

ii) In generally the WBC has been classified into two group such as,

a) Lymphocytes b) Leucocytes

iii) WBC protect the body against the bacteria.

iv) WBC cells can move around the body and able to destroy the toxic bacteria.

v) Leucaemia is a disease where the number of WBC cells are abnormally large.

3.Plateletsi) Platelets cells are also colorless.ii) It looks irregular shaped cells iii) They are roughly about 1/7th of the size of RBC.iv) They are fewer in number v) They help in blood clotting

Blood plasma i) Liquid portion of the blood is called blood

plasma.Blood clotting

Blood Plasma:

Blood plasma is the liquid portion of the blood

BP looks straw-colored, thick fluid

BP contains 91% water, with many organic and inorganic substances dissolved in.

One of this substances is called Fibrinogen which is helpful for blood clotting

Liquid portion of the blood also called serum

In the serum contains antibodies

Another liquid which is derived from BP is called Lymph

The functions of Lymph is to protect disease

Blood Clotting: If a large amount of blood is lost at one time and it can not be replaced rapidly enough and the animal will die.

Therefore it is important to release from loss of blood from wounds and injuries is stopped relatively quickly.

The blood forming a solid mass on the surface of the skin, a process known as clotting.

Four substances are necessary for clotting:a). Prothrombinb). ThromboplastinC). CalciumD). FibrnogenThromboplastin is releases from the damaged tissue and from the damaged platelets

The Thromboplastin acts on Prothrombin, provided sufficient calciumAfterwards turns it into an active form called ThrombinThis active thrombin turn into fibrinogen in the plasma to give fibrin which is the substances composing the fibrous network of the clot

Thromboplastin

Prothrombin,

calcium

Thrombin

Fibrinogen

Blood Clotting

Acts on

Produce

Turn into active form

Turn into active form

Release Fibrin helps to

Normally blood does not clot while it is in the body, because there is not enough free thromboplastin until tissue and cells are damaged

If anybody die due to serious blood injured condition, this situation is called HaemophiliaSome drugs or poisons will prevent clotting and these are known as Anti-coagulationHaemorrahge-means bleedingAnaemia-means lack of blood

Blood Circulation:

The blood circulation round the body in a closed system consisting of the heart, which is the pump and a network of tubes known as the blood vessel.

The heart is a four-Chambered organ with very strong walls of cardiac muscle

Blood leaves from the heart by Arteries

Blood return to the heart by Veins

What Is the Heart?Heart is a muscular organ that acts like a pump to continuously send blood throughout your body.

Heart is at the center of circulatory system. This system consists of a network of blood vessels, such as arteries, veins, and capillaries. These blood vessels carry blood to and from all areas of the body.

Four division of the heart:

a).Right and left Auricles.b). Right and left Ventricles.

The heart is surrounded by a membrane called the pericardium

Blood passes from auricles to ventricles

Four division of the heart:

a).Right and left Auricles.b). Right and left Ventricles.

The heart is surrounded by a membrane called the pericardium

Blood passes from auricles to ventricles