Transcript Physiological responses to exercise

Physiological responses to
exercise
The Cardio-respiratory System
• The cardio-respiratory system is made up of the heart
(cardio) and lungs (respiratory)
• Together they are responsible for delivering oxygen and
other nutrients around the body
• The heart and vessels that connect to it are known as the
cardiovascular system
• The cardiovascular system pumps blood and oxygen out
to the muscles, which gives the body the energy it needs
• The cardiovascular system pumps blood and oxygen out
to the muscles during exercise as well as removing waste
products such as carbon dioxide.
• Fill in missing words - workbook
• The respiratory system inhales oxygenated air into
the lungs and transports it into the blood through
thin walls in the alveoli.
• The cardiovascular system transports the
oxygenated blood to the heart and pumps it out to
working muscles through a series of vessels known
as artilleries and capillaries.
• Once the muscle has been supplied with oxygen,
the blood returns to the heart through vessels
known as veins.
Label the Cardio-respiratory system
Label the Cardio-respiratory
system
*in workbook*
WORD LIST
respiratory
oxygen
muscles
heart
heart
transported
increasing
cardiovascular
working
breathing
oxygen
exercise
lungs
energy
draws
The ___ and lungs are responsible for moving ___ around the body.
The ___ system inhales oxygen into the ___ where it is ___ into the
blood. The ___ system pumps ___ filled blood around the body where
it provides the ___ with the ___ it needs to perform work. The cardio
respiratory system ___ more oxygen into the body as a response to
___ . It does this by ___ both its ___ and ___ rate to deliver an
increased quality of oxygen to ___ muscles.
The heart and lungs are responsible for moving oxygen
around the body. The respiratory system inhales oxygen
into the lungs where it is transported into the blood.
The cardiovascular system pumps oxygen filled blood
around the body where it provides the muscles with the
energy it needs to perform work. The cardio respiratory
system draws more oxygen into the body as a response
to exercise. It does this by increasing both its breathing
and heart rate to deliver an increased quality of oxygen
to working muscles.
Physiological Responses to
Exercise
When the body performs physical activity
some changes take place. Most of these
changes occur as the result of the muscular
and cardio respiratory systems having to
work harder so the body can perform
exercise.
Match the cause with each physiological response to exercise
Physiological Response
Increase in body
temperature/sweating
Increase in breathing
Increase in heart rate
Muscle fatigue
Causes / Actions
a. Muscle energy reserves become
depleted
b. Beads of moisture cool the surface of
the skin
c. In the absence of oxygen, muscle builds
up with waste products such as lactic acid
d. Waste gases such as carbon dioxide are
removed from the body
e. Deliver more oxygen filled blood to the
working muscles
f. Body gets hotter because of muscle
repeatedly contracting
g. More oxygen is drawn into the body to
be used for exercise
*in workbook*
Increase in body temperature/sweating
b. Beads of moisture cool the surface of the skin
f. Body gets hotter because of muscle repeatedly contracting
Increase in breathing
d. Waste gases such as carbon dioxide are removed from body
g. More oxygen is drawn into the body to be used for exercise
Increase in heart rate
e. Deliver more oxygen filled blood to the working muscles
Muscle fatigue
a. Muscle energy reserves become depleted
c. In the absence of oxygen, muscle builds up with waste
products such as lactic acid
Cardiovascular system change
Heart rate – increase
Supply more blood to muscle
Respiratory system change
Breathing rate – increase
Supply more oxygen to the body to continue to provide energy for
exercise
Muscular system change
Muscle soreness – increase
Lactic acid builds up in the muscle as a by-product of exercise
Temperature – increase
Muscles contraction produces extra heat, which needs to be
removed
• Think about this…….
• Why do the physiological indicators (ie
heart rate and temperature) not return
to normal levels immediately after
exercise stops
• Explain why the physiological indicators (ie heart rate and
temperature) don’t return to normal levels immediately after
exercise stops
The body is still working to remove
waste products from the muscle and
clear carbon dioxide from the blood
and gradually reduce the body
temperature back to normal