KENDRIYA VIDYALAYA SARNI

BIOLOGY PROJECT WORK

By the help of body fluid like blood diffirent materials transport through out the day . The heart pump the blood for the supplying of material the whole process is called circulation

Circulation

The flow of blood by the pumping of heart is called circulation. The blood transport deffirent material both useful and useless to deffirent pasrts of our body . It also transport gases. or

Types of circulation

There are two types of cirulatory system found among animals ,open circulatory system and closed circulatory system . In open type blood flow without blood tubes like the insects of phylum arthropoda and is closed type the blood flow inside of blood tube like in human being.

TWO TYPES OF CIRCULATORY SYSTEM

SINGLE CIRCULATION

DOUBLE CIRCULATION

In such type of circulation only the impure blood circulated by the heart . The heart of fishes contain only two chambers 1atria and 1 ventricle.

Atria receive the impure blood throughtuot the body and passing it through the

ventricle , ventricly pump the co2 to the h2o. The water elinimated from mouth.

Single circulation

Double circulation

In such type of circulation both pure and impure blood is circulated by the heart simultaneously, example:- human bieng. The humans heart contain 4 chambers 2 atria and 2 ventricles . Right atria receive the impure blood and left atria receive the pure blood than the blood pss to their respected. Ventricles. Right ventricle release the impure blood to lungs and left ventricle release the blood to the whole body by contraction.

double circultion is more benificial because sufficient quantity of oxygen can be supply to the cells of our body.

Blood pressure

The pressure apply on the wall of arteries by the foolowing blood is called blood pressure . It has two values.

1.120 milimerter mercury (mmhg)sijstolic mressure.

2. 80 milimerter mercury (mmhg) deastolic pressure.

High blood pressure

When the deamerter of artries get reduced due to the deposition of cholestrol the blood flow cannot be maintained properly in such conditions the heart has to work more powerfully to send the entire quantity of blood this conditions is called as high blood pressure.

Frndzz msst!! time

Presented by :-

Guided by :-

Mr. S.K. ROY

Tushar solankiXTH “A”