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CIRCULATION includes transport of nutrients, respiratory gases,metabolic intermediates,water, heat and waste products.

MAIN PARTS OF CIRCULATORY MAIN PARTS OF CIRCULATORY SYSTEMSYSTEM

1 BLOOD 2 BLOOD VESSELS3 HEART

BLOODBLOOD Blood is liquid connective tissue containing Blood is liquid connective tissue containing

organic and inorganic substances along with organic and inorganic substances along with cellular contentscellular contents

These functions are carried by blood which is an important fluid connective

tissue and composed of

BLOOD VESSELSBLOOD VESSELSBlood vessels are the tube in which Blood vessels are the tube in which

blood flows blood flows 1.1. ArteriesArteries2.2. Veins Veins 3.3. Capillaries Capillaries

Differences between arteries and veins.Differences between arteries and veins.

ARTERYARTERYMostly oxygenated blood flowsThick and elastic walls,without valves.

VEINVEINMostly deoxygenated blood flows.Thin and less elastic walls,with valves.

Heart is divided into four chambers –the right and left atria or auricles and right and left ventricles

Blood Circulation in a Closed Blood Circulation in a Closed Circulatory SystemCirculatory System..

heart

lungs

BLOOD PRESSURE

Pressure exerted by the blood on the wall of the blood vessels in which it is present.Blood pressure in a normal person=120/80mm Hg.It is measured by an instrument called sphygmomanometer.

ENCARTA ENCYCLOPEDIA .

HUTCHINSONS ENCYCLOPEDIA

CLASS.TEACHER.COM.

N.C.E.R.T. TEXT BOOK OF CLASS IX

Pulmonary circulation

PORTAL PORTAL CIRCULATIONCIRCULATION