1. The Circulatory System

2. OB14, OB15
Understand the structure and function of the heart, identify the four chambers of the heart, and explain the difference between the left and right ventricles
Describe the passage of blood through the heart and lungs via arteries and veins, identify the pulmonary artery and vein, aorta and vena cava, and distinguish between arteries, veins and capillaries

3. There are THREE types of blood vessels
ARTERIES
Carry blood away from the heart
Thick, muscular, stretchy wall
Narrow central tube

4. VEINS Carry blood towards the heart Thin walls with little muscle
Wide central tube
Have valves stop the blood flowing backwards

5. Circulatory system LUNGS Artery – red Vein - blue HEART ARTERY
carrying oxygenated blood to leg
VEIN carrying deoxygenated blood back to heart

6. CAPILLARIES carry blood between arteries and veins
wall only one cell thick
very narrow central tube

7. All Blood Vessels Artery Veins Capillaries Thick Walls
Blood from heart
Veins
Thin walls
Blood to heart
Contain valves
Capillaries
Very thin walls and tube
Carry oxygen and food to cells

8. The Heart Thick muscular walls Divided into 4 chambers
Right side pumps blood to lungs
Left side pumps oxygenated blood from the lungs to ALL parts of body

10. The heart is divided into FOUR chambers
Right Ventricle
Right Atrium
Left Atrium
Left Ventricle
The heart is divided into FOUR chambers

11. The heart has four major blood vessels
To lungs
To body
From body
PULMONARY VEIN
AORTA
PULMONARY Artery
VENA CAVA
From lungs
VENA CAVA
The heart has four major blood vessels

14. Where can we find a pulse? The pulse can be felt at:
A healthy heart at rest will beat 70 times every minute
The pulse can be felt at:

15. ..\..\..\blood around body\Blood around body.exe

16. Heart

17. Inside every cell oxygen is added to glucose in RESPIRATION to produce
WATER + CARBON DIOXIDE +
ENERGY

18. Draw a flow chart Show the route of a red blood cell
Starting at lungs and moving via heart to arm
Leaving the arm and returning back to the lungs
Labelled oxygenated blood cells (red), deoxygenated blood cells (blue), the heart, lungs, arteries and veins

20. The Blood The blood has three main purposes
Transport stuff around the body (Food, Oxygen, Carbon Dioxide and Urea)
Defence (White Blood Cells)
Clotting (Platelets)

21. Parts of the Blood
Plasma – This is the name for the liquid that all the cells float in. Mostly water with Glucose, Protein and Urea dissolved in it.

22. Parts of the Blood
Red Blood Cells – Carry the oxygen around the body. The oxygen combines with HAEMOGLOBIN to turn the blood red. When there is no oxygen in the Haemoglobin it turns purple.

23. Parts of the Blood
White Blood Cells – Eat the bacteria that invade the body. Forming the main part of the IMMUNE SYSTEM.
Some can also produce anti-bodies.

24. Parts of the Blood
Platelets – Allow the blood to clot by all rushing to the injury.

27. All Blood Vessels Artery Veins Capillaries Thick Walls
Blood from heart
Veins
Thin walls
Blood to heart
Contain valves
Capillaries
Very thin walls and tube
Carry oxygen and food to cells

28. Left side muscle is thicker as it has to pump the blood to all parts of the body.
The right side just takes it to the lungs

29. Blood Summary Type Function Appearance Plasma Red Blood Cell
Carries glucose, protein and waste.
Clear Liquid
Red Blood Cell
Carry Oxygen to cells in Haemoglobin
Red or blue
White Blood Cell
Prevent Disease and attack invaders
Many different cells
Platelets
Clot the blood
Fragments of cells

30. The blood mobile
Nominated for 6 Oscars by ……..

31. H/W
P54
1,2,3,6,7