The circulatory system consists of the heart, blood vessels, and blood. The heart has four chambers that keep oxygenated and deoxygenated blood separate, improving oxygen exchange efficiency. Blood travels from the superior and inferior vena cavae to the right atrium, right ventricle, pulmonary artery, lungs, pulmonary veins, left atrium, and left ventricle before exiting through the aorta. While arteries generally carry oxygenated blood and veins deoxygenated blood, the pulmonary artery carries deoxygenated blood from the heart to the lungs and the pulmonary vein carries oxygenated blood from the lungs to the heart.

1. BY: NOOR ZANARRIYAH MOHAMAD GANI D20091034827 SARAH SABILLAH IBRAHIM D20091034820 SITI SHAHIDA MOHD AZIRI D20091034836 ZAINAB FASIHAH MUHAMAD SUKARDI D20091034842

3. The main features of animal circulatory system is blood, vessel and heart Overview of Circulatory System

6. DRAWING

7. Scientific explanation Arteries do carry oxygenated blood EXCEPT for PULMONARY ARTERY which carry deoxgenated blood from heart to lungs to undergoes gaseous exchange process Veins do carry deoxygenated blood EXCEPT for PULMONARY VEIN which carry oxygenated blood from lungs to heart (left atrium) It is better to remember that arteries carry blood away from the heart and veins carry blood to the heart