The heart has four chambers divided into two sides and uses systole and diastole to pump blood through two circuits. The pulmonary circulation passes blood to the lungs to oxygenate it before the systemic circulation distributes oxygenated blood to the rest of the body via the aorta and returns deoxygenated blood to the heart via the vena cava. Together, the heart and circulation form a double circulatory system that oxygenates blood in the lungs and transports it to the body's tissues and back.

1. The heart and circulation

2. The heart
 It is a muscular organ located in the chest
 It is divided into 2 parts
 It has got 4 chambers: 2 atria & 2 ventricles
 It has 2 movements:
 Systole
 Diastole

3. The heart

4. The heart

5. The Heart
This is a vein. It brings These are arteries.
blood from the body, They carry blood away
except the lungs. from the heart.
2 atria
Coronary arteries,
the hearts own
2 ventricles blood supply
The heart has four chambers

6. Circulation
 Blood follows 2 routes:
 Pulmonary circulation: between the heart and lungs.
Blood with carbon dioxide comes out of the right
ventricle through the pulmonary artery.
In the alveoli blood leaves carbon dioxide and picks up
oxygen.
Blood goes to the left atrium through the pulmonary veins.

7. Circulation
 Systemic Circulation:
 Between the heart and the rest of the body
 Blood with oxygen leaves the left ventricle through the
aorta
 Blood distributes oxygen and takes carbon dioxide
 It returns to the right atrium through the vena cava

8. How does this system work?
pulmonary vein lungs pulmonary artery
head & arms
aorta
main
vein
Right Left
liver
digestive system
kidneys
legs

9. Our circulatory system is a double circulatory system.
This means it has two parts parts.
Lungs
the right side of the the left side of the
system system
deals with deals with
deoxygenated oxygenated blood.
blood.
Body cells