1 of 18

2 of 18

3 of 18

4 of 18

5 of 18

6 of 18

7 of 18

8 of 18

(5) life functions for multicellular organisms

GAS EXCHANGE

NUTRIENTS

WASTE REMOVAL

PROTECTION

COMMUNICATION

9 of 18

CARDIO = heart vascular = blood vessels

10 of 18

THREE PARTS OF CARDIOVASCULAR SYSTEM

  • BLOOD VESSELS
  • BLOOD
  • HEART

11 of 18

BLOOD VESSELS

12 of 18

BLOOD about five litres… in you

13 of 18

PATH OF BLOOD START AT THE LUNGS to pick up oxygen

14 of 18

it follows this path in this order

lung

pulmonary veins

left atrium, left ventricle of the heart

aorta

arteries

capillaries

veins

superior and inferior vena cava

right atrium, right ventricle of the heart

lung

15 of 18

HOW DOES BLOOD MOVE THROUGH ARTERIES?

  • BLOOD IS PUSHED BY VENTRICULAR SYSTOLE, THE VENTRICLES OF THE HEART SQUEEZING BLOOD
  • THE PULSATING, PUSHING MOVEMENT GIVES YOU A PULSE
  • FEEL YOUR PULSE

16 of 18

HOW DOES BLOOD MOVE THROUGH THE VEINS?

  • BLOOD IS SQUEEZED THROUGH MUSCLE CONTRACTIONS
  • ONE WAY VALVES PREVENT BACK FLOW
  • SOME OF YOU MIGHT BE ABLE TO OBSERVE THIS ON YOUR OWN ARM IF YOUR VEINS ARE NEAR THE SURFACE

17 of 18

18 of 18

LABEL THE MAJOR ARTERIES AND VEINS