The circulatory system includes the heart, blood vessels, and blood. The main parts are the blood, blood vessels (arteries, veins, and capillaries), and heart. Blood is a liquid connective tissue that transports nutrients, gases, waste, etc. around the body via the blood vessels. Arteries carry oxygenated blood away from the heart while veins carry deoxygenated blood back to the heart. The heart is divided into four chambers that pump blood through the closed circulatory system to the lungs and throughout the body.

1. MADE BY :- NARENDRA KUMAR
K.V.LKO CANN”T LUCKNOW

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

3. MAIN PARTS OF CIRCULATORYMAIN PARTS OF CIRCULATORY
SYSTEMSYSTEM
1 BLOOD
2 BLOOD VESSELS
3 HEART

4. BLOODBLOOD
 Blood is liquid connective tissue containingBlood is liquid connective tissue containing
organic and inorganic substances along withorganic and inorganic substances along with
cellular contentscellular contents

5. These functions are carried by blood
which is an important fluid connective
tissue
and composed of

6. BLOOD VESSELSBLOOD VESSELS
Blood vessels are the tube in which bloodBlood vessels are the tube in which blood
flowsflows
1.1. ArteriesArteries
2.2. VeinsVeins
3.3. CapillariesCapillaries

7. Differences between arteries and veins.Differences between arteries and veins.
ARTERYARTERY
Mostly oxygenated
blood flows
Thick and elastic
walls,without valves.
VEINVEIN
Mostly deoxygenated
blood flows.
Thin and less elastic
walls,with valves.

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

10. Blood Circulation in a Closed Circulatory SystemBlood Circulation in a Closed Circulatory System..
heart
lungs

11. 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.

12. ENCARTA ENCYCLOPEDIA .
HUTCHINSONS ENCYCLOPEDIA
CLASS.TEACHER.COM.
N.C.E.R.T. TEXT BOOK OF CLASS IX

13. Pulmonary circulation

14. PORTALPORTAL CIRCULATIONCIRCULATION