OXYGEN TRANSPORT OXYGEN TRANSPORT SYSTEMSYSTEM

OxygenOxygen

In order to work and create movement, our In order to work and create movement, our muscles need oxygen.muscles need oxygen.

You body needs a regular supply of oxygen You body needs a regular supply of oxygen to stay alive.to stay alive.

The working muscles need energy, which is The working muscles need energy, which is supplied by oxygen.supplied by oxygen.

As an activity becomes more demanding the As an activity becomes more demanding the need for oxygen is greater.need for oxygen is greater.

How does oxygen reach the muscles?How does oxygen reach the muscles?

The lungs, heart, blood and muscles all play an important part in the The lungs, heart, blood and muscles all play an important part in the oxygen oxygen transport system. transport system. The whole oxygen transport system works in a cycle.The whole oxygen transport system works in a cycle.

The respiratory system and the circulatory systemThe respiratory system and the circulatory system work together to provide work together to provide the muscles with oxygen – this enables you to exercise.the muscles with oxygen – this enables you to exercise.

THE RESPIRATORY SYSTEMTHE RESPIRATORY SYSTEM

Enables air to be inhaled (breathed in).Enables air to be inhaled (breathed in).

When you breathe in, oxygen enters your lungs and is absorbed into your When you breathe in, oxygen enters your lungs and is absorbed into your blood which is pumped around your body by your heart.blood which is pumped around your body by your heart.

The oxygenated blood allows the cells within your body to use energy to help The oxygenated blood allows the cells within your body to use energy to help you exercise so the muscles can produce movement.you exercise so the muscles can produce movement.

When your cells produce energy and the muscles use the oxygen up, a waste When your cells produce energy and the muscles use the oxygen up, a waste product called product called carbon dioxide carbon dioxide is produced.is produced.

The carbon dioxide is carried back to the lungs by the blood; it is then removed The carbon dioxide is carried back to the lungs by the blood; it is then removed from your body when you breathe out.from your body when you breathe out.

Breathing is an automatic process (you do not think about it) it is controlled by Breathing is an automatic process (you do not think about it) it is controlled by the brain.the brain.

THE CIRCULATORY SYSTEMTHE CIRCULATORY SYSTEM

This system consists of the heart and the blood This system consists of the heart and the blood vessels.vessels.

The heart is a pump, which pushes the blood through The heart is a pump, which pushes the blood through the vessels.the vessels.

The blood flows round the body in a continuous The blood flows round the body in a continuous system.system.

By contracting and relaxing the heart muscles can By contracting and relaxing the heart muscles can pump blood around the body.pump blood around the body.

With an improved oxygen transport system, the body will With an improved oxygen transport system, the body will be more able to cope with exercise. As a person becomes be more able to cope with exercise. As a person becomes fitter, less effort is needed for the same amount of work.fitter, less effort is needed for the same amount of work.

A regular programme of training will improve the efficiency A regular programme of training will improve the efficiency

of the heart and lungsof the heart and lungs. .

The size of the heart will increase. As a result the body’s The size of the heart will increase. As a result the body’s pump will become bigger and so more blood can be pump will become bigger and so more blood can be pushed along the vessels per beat. There will be an pushed along the vessels per beat. There will be an increase in the number of red blood cells and therefore an increase in the number of red blood cells and therefore an increase in oxygen.increase in oxygen.

MORE BLOOD = MORE OXYGENMORE BLOOD = MORE OXYGEN

Regular exercise lowers the heart rate, the lower your heart Regular exercise lowers the heart rate, the lower your heart rate the fitter you are. After exercise the fitter you are the rate the fitter you are. After exercise the fitter you are the quicker your pulse will return to normal levelsquicker your pulse will return to normal levels

The capacity of the lungs will increase which will The capacity of the lungs will increase which will give the body more oxygen with each breath. The give the body more oxygen with each breath. The more oxygen you can take into your lungs the more oxygen you can take into your lungs the greater your capacity will be for exercise.greater your capacity will be for exercise.

Question 1Question 1a) Why do we need oxygen?a) Why do we need oxygen?

b) When we exercise which part of the body needs b) When we exercise which part of the body needs oxygen? oxygen?

c) What parts of the body are involved in the oxygen c) What parts of the body are involved in the oxygen transport system?transport system?

d) What two systems work together to produce d) What two systems work together to produce oxygen for the muscles?oxygen for the muscles?

Question 2Question 2a)a) What is the function of the respiratory system?What is the function of the respiratory system?

b)b) What is the function of the circulatory system?What is the function of the circulatory system?

c)c) What effects will an improved oxygen transport What effects will an improved oxygen transport system have on the body?system have on the body?

d)d) With regular training the efficiency of the heart With regular training the efficiency of the heart and lungs will improve. What will happen to the and lungs will improve. What will happen to the heart and lungs?heart and lungs?

Question 3Question 3Fill in the gaps, words can only be used once.Fill in the gaps, words can only be used once.

carbon dioxide lungs muscles oxygenatedcarbon dioxide lungs muscles oxygenated As we breathe, oxygen enters the ……. and is absorbed As we breathe, oxygen enters the ……. and is absorbed

into the bloodstream. The heart pumps this ……. blood to into the bloodstream. The heart pumps this ……. blood to the ……. to help produce movement. However, ……. is the ……. to help produce movement. However, ……. is then produced and must be absorbed back to the blood, then produced and must be absorbed back to the blood, pumped to the heart then onto the lungs, before breathed pumped to the heart then onto the lungs, before breathed out.out.

Question 5Question 5a)a) Describe what happens in order for our muscles Describe what happens in order for our muscles

to get oxygen?to get oxygen?

b)b) What will happen if our muscles are not supplied What will happen if our muscles are not supplied with sufficient amounts of oxygen?with sufficient amounts of oxygen?

c)c) With oxygen = With oxygen =

Without oxygen = Without oxygen =