A healthy person,
male, aged 20-30
years old wants to
climb Mount
Everest. Describe
the changes in his
circulatory and
res...
a) Climbing the mountain: CIRCULATORY SYSTEM

An aerobic
activity. The
man needs
more oxygen.

Heart rate
increases.
Heart...
a) Climbing the mountain: RESPIRATORY SYSTEM
Body’s need for fresh
oxygen increases.
The rate of respiration also
increase...
b) When he reached the highest peak: CIRCULATORY SYSTEM
At high altitudes, the decrease in barometric
pressure reduces the...
b) When he reached the highest peak: RESPIRATORY SYSTEM
• Everyone breathes faster and deeper
(hyperventilates) at high al...
Symptoms of High Altitude Sickness
Loss of appetite, nausea, or vomiting

Fatigue or weakness
Feeling dizzy, light-head...
How to treat High Altitude Sickness??
Early diagnosis is important. Acute mountain sickness is easier to treat
in the earl...
would it make any
difference if the
climber is a female?
Yes. Because female’s
metabolism and body
strength is lower than ...
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  • Lets say that a healthy person,male, aged 20-30 years old wants to climb Mount Everest. Please describe the changes in his circulatory and respiratory system when he
  • heart rate increases, and your heart pumps more blood.
  • Why??
  • Symptoms of High Altitude Sickness
  • How to treat High Altitude Sickness??
  • Yes. Because female’s metabolism and body strength is lower than the males.
  • Presentation2

    1. 1. A healthy person, male, aged 20-30 years old wants to climb Mount Everest. Describe the changes in his circulatory and respiratory system when he: a) is climbing the mountain (hint: strenuous activity)
    2. 2. a) Climbing the mountain: CIRCULATORY SYSTEM An aerobic activity. The man needs more oxygen. Heart rate increases. Heart pumps more blood. Diastolic pressure drops. The man breathe deeper. Systolic blood pressure rises and blood volume increases.
    3. 3. a) Climbing the mountain: RESPIRATORY SYSTEM Body’s need for fresh oxygen increases. The rate of respiration also increases to facilitate the delivery of oxygen to the blood stream and working muscles. Ventilation rate responds accordingly. Concentration of CO2 increases. Why?? The metabolic by products of exercise build up as a result of cellular respiration, and the amount of carbon dioxide in the system also increases to act as a buffer against these acidic by products.
    4. 4. b) When he reached the highest peak: CIRCULATORY SYSTEM At high altitudes, the decrease in barometric pressure reduces the amount of oxygen initially available in the environment. Tissue hypoxia, as a result of the significant decrease in oxygen availability in inspired air. A reduction in plasma volume caused by increased respiratory, urinary, and cutaneous losses. The initial cardiovascular response to altitude is characterized by an increase in cardiac output. Pulmonary artery pressure increases. The hypoxic ventilatory response persists for the sea-level resident who remains at high altitude.
    5. 5. b) When he reached the highest peak: RESPIRATORY SYSTEM • Everyone breathes faster and deeper (hyperventilates) at high altitude. • The lung response to acute altitude exposure is mainly hyperventilation which, together with elevated heart rate, aims at achieving an adequate supply of oxygen to the tissues. • Besides the compensatory response, other mechanisms affect lung physiology during hypoxic exposure: the increase of pulmonary artery pressure and endothelial permeability. • In simple words, lungs conditions at higher altitudes is faster, deeper breathing because of an increased oxygen demand, and carbon dioxide must be expelled.
    6. 6. Symptoms of High Altitude Sickness Loss of appetite, nausea, or vomiting Fatigue or weakness Feeling dizzy, light-headed or faint Disturbed sleeping patterns Confusion and disorientation Impaired memory Mood swings
    7. 7. How to treat High Altitude Sickness?? Early diagnosis is important. Acute mountain sickness is easier to treat in the early stages. The main treatment for all forms of mountain sickness is to climb down (descend) to a lower altitude as rapidly and safely as possible. You should not continue climbing if you develop symptoms. Extra oxygen should be given, if available. People with severe mountain sickness may need to be admitted to a hospital. Acetazolamide (Diamox) may be given to help you breathe better. It can help reduce mild symptoms. This medicine can make you urinate more often. Drink plenty of fluids and avoid alcohol when taking this drug. This medication works best when taken before reaching a high altitude.
    8. 8. would it make any difference if the climber is a female? Yes. Because female’s metabolism and body strength is lower than the males.

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