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30 Cards in this Set

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  • Back
Parts of the circulatory system
heart

arteries

veins

capillaries
Function of blood
1. Transport of oxygen to all cells of the body.

2. Transport of nutrients to each cell of the body.

3. Transport of wate materials to the excretory organs.

4. Transport of hormones.

5. Controld of inorganic substances like sodium, potassium and other minerals in the body. These elements help maintain the fluid balance, that is the correct amount of water in blood and other tissues.

Protection of the body against germs.

Transport of heat and control of the body temperature.
function of oxygen in the blood
helps the cells to breakdown glucose to give energy
formula of glucose
C6H12O6
How does blood move through the arteries?
Heart acts like a pump. Due to continuous copntraction and relaxation of the heart muscles the blood is pumped into the arteries.
What is pulse?
The continuous pumping action of the heart is felt as the pulse.
Average pulse of an adult
70
average pulse of a newborn baby
140
Aveage pulse of a three year old
100
quantity of blood the heart pumps every day
15,000 litres
How long does it take the total amount of the blood in the body to pass through the heart?
once every 24 seconds
Reasons for increased pulse rate.
Exercise

when we are scared

when we have fever
Function of the arteries
1. Carry blood from the heart to the various organs.

2. Carry pure blood except the pulmonary artery, which carries impure blood from the heart to the lungs.

3. Thick muscular walls to withstand the pressure of the pumped blood.

4. Deep seated.

5. Blood in arteries flow with pressure

6. Blood in arteries red in colour.

7. Do not have valves
Function of the veins.
1. Carry blood from the various organs to the heart.

2. Carry impure blood except the pulmonary vein, which carries pure blood from the lungs to the heart.

3. Thin muscular walls.

4. superficial, lies below the skin.

5. Blood in veins flow slowly.

6. Blood in veins darker in colour.

7. Veins have valves which prevent the blood from flowing backwards in the veins.
Main artery from the heart to the body parts is called
aorta
branching of arteries
Arteries branch into arterioles and then into fine capillaries.
branches of veins
Capillaries join up to form venules. Venules join together to form veins
Name the most important tissue in the circulatory system
Blood
Parts of the blood.
White Bood cells (WBC)

Red blood cells (RBC)

Platelets

All these float in the liquid called plasma.
Function of the WBC
Responsible for fighting disease.
How long does it take the total amount of the blood in the body to pass through the heart?
once every 24 seconds
Reasons for increased pulse rate.
Exercise

when we are scared

when we have fever
Function of the arteries
1. Carry blood from the heart to the various organs.

2. Carry pure blood except the pulmonary artery, which carries impure blood from the heart to the lungs.

3. Thick muscular walls to withstand the pressure of the pumped blood.

4. Deep seated.

5. Blood in arteries flow with pressure

6. Blood in arteries red in colour.

7. Do not have valves
Function of the veins.
1. Carry blood from the various organs to the heart.

2. Carry impure blood except the pulmonary vein, which carries pure blood from the lungs to the heart.

3. Thin muscular walls.

4. superficial, lies below the skin.

5. Blood in veins flow slowly.

6. Blood in veins darker in colour.

7. Veins have valves which prevent the blood from flowing backwards in the veins.
Main artery from the heart to the body parts is called
aorta
branching of arteries
Arteries branch into arterioles and then into fine capillaries.
branches of veins
Capillaries join up to form venules. Venules join together to form veins
Name the most important tissue in the circulatory system
Blood
Parts of the blood.
White Bood cells (WBC)

Red blood cells (RBC)

Platelets

All these float in the liquid called plasma.
Function of the WBC
Responsible for fighting disease.