1. Circulation Aims To know the composition of blood
Learn the methods that white blood cells fight infection
Learn the difference between arteries, veins and capillaries

2. Fight infection Transport clot the blood Functions of Blood Glucose
Urea
Carbon dioxide
Oxygen
clot the blood

3. White blood Red Blood Cells cells Plasma Platelets What is the blood
Transports Oxygen
What is the blood
made of?
Fights Infection
Plasma
Platelets
Transports Glucose, Carbon Dioxide, Urea and Water
Clots the Blood

4. Red Blood Cells Transport Oxygen Round disc shape Contain Hemoglobin
No nucleus

5. White Blood Cells
Fight Disease
Irregular Shape
Have a nucleus

6. Plasma
Yellow liquid mostly made of water with chemicals dissolved in it
Transports
Food
Chemical wastes:urea, carbon dioxide

7. Platelets
Tiny fragments of cells
Clot the blood

8. The four parts of blood
1. RED BLOOD CELLS – contain haemoglobin and carry ______ around the body. They have no _______ and a large surface area.
2. PLATELETS – small bits of cells that lie around waiting for a cut to happen so that they can ____ (for a scab).
3. WHITE BLOOD CELLS – kill invading _______ by producing _________ or engulfing (“eating”) the microbe.
These three are all carried around by the PLASMA (a straw-coloured liquid). Plasma transports CO2 and ______ as well as taking away waste products to the ______.
Words – antibodies, clot, kidneys, oxygen, nucleus, glucose, microbes.

9. White Blood Cells and Diseases
There are two types of White Blood Cell:
1. Ones that kill micro-organisms by ingesting them and digesting them:
2. Others produce chemicals called
Antibodies which kill particular bacteria or viruses

10. Arteries, veins and capillaries
Arteries carry high pressure blood away from the heart. They have a thick wall and no valves.
Capillaries have thin walls (one cell thick) to allow glucose and oxygen to pass through. Also used to connect arteries to veins.
“Lumen”
Veins carry low pressure blood back to the heart. They have thinner walls and have valves to prevent backflow of blood.

11. Blue colour indicates deoxygenated blood
Red colour indicates
Oxygenated blood

12. Double circulatory system
This section of the system including the right side of the heart, deals with the deoxygenated blood.
Lungs
Body cells
This section of the system including the left side of the heart, deals with the oxygenated blood.

13. The Circulatory system
The circulatory system is responsible for pumping ______ around the body. We need blood to be taken around the body because blood contains ________ and _______. These are needed so that all the ____ in our bodies can produce _____ through _________.
The main organs in the circulatory system are the _____, the lungs and the kidneys.
Words – energy, heart, blood, glucose, respiration, oxygen, cells

14. The Heart
The Heart is a muscular organ that acts as a PUMP in a DOUBLE CIRCULATORY SYSTEM

15. The heart the size of a fist

17. The Heart

22. The Heart
1. Deoxygenated blood (i.e. blood without oxygen) enters through the vena cava into the right atrium
4. Oxygenated blood from the lungs enters through the pulmonary vein into the left atrium
2. It’s then pumped through the tricuspid valve into the right ventricle
5. It’s then pumped through the bicuspid valve into the left ventricle
3. It’s then pumped through the semi-lunar valve up to the lungs through the pulmonary artery
6. It’s then pumped out of the aorta to the rest of the body

23. The “Double Circulatory” System
1. Deoxygenated blood is pumped from the heart to the lungs
2. The blood receives oxygen and is pumped back to the heart
4. The oxygen leaves the blood to be used for respiration in the body and the blood goes back to the heart
3. The oxygenated blood is then pumped to the rest of the body

24. The Heart
4. Oxygenated blood from the lungs enters through the pulmonary vein into the left atrium
1. Deoxygenated blood (i.e. blood without oxygen) enters through the vena cava into the right atrium
2. It’s then pumped through the tricuspid valve into the right ventricle
5. It’s then pumped through the bicuspid valve into the left ventricle
3. It’s then pumped through the semi-lunar valve up to the lungs through the pulmonary artery
6. It’s then pumped out of the aorta to the rest of the body

25. Circulation
1) Blood gets pumped from the heart to the lungs and picks up oxygen
2) The blood is then taken back to the heart…
3) The heart pumps the blood to the intestine (where oxygen and glucose are removed)…
5) After the oxygen and glucose have been removed for respiration the blood is sent back to the heart and starts again
4) … and to the rest of the body (where oxygen is removed)

26. The Role of Haemoglobin
Step 1: Oxygen diffuses into the blood and combines with haemoglobin to form oxyhaemoglobin O2
Oxyhaemoglobin

27. The Role of Haemoglobin
Step 1: Oxygen diffuses into the blood and combines with haemoglobin to form oxyhaemoglobin O2
Step 2: The blood takes oxygen to the rest of the body

28. The Role of Haemoglobin
Step 1: Oxygen diffuses into the blood and combines with haemoglobin to form oxyhaemoglobin
Step 2: The blood takes oxygen to the rest of the body
Step 3: The oxygen leaves the blood and diffuses into the cells to be used in respiration O2