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Maintaining Life in the Human Body. Maintaining Life To maintain life the human body must : Maintain...
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Transcript of Maintaining Life in the Human Body. Maintaining Life To maintain life the human body must : Maintain...
![Page 1: Maintaining Life in the Human Body. Maintaining Life To maintain life the human body must : Maintain boundaries Maintain movement Respond to stimuli Digest.](https://reader035.fdocuments.in/reader035/viewer/2022081511/5697c0201a28abf838cd2421/html5/thumbnails/1.jpg)
Maintaining Life in the Human Body
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Maintaining LifeTo maintain life the human body must :
Maintain boundaries
Maintain movement
Respond to stimuli
Digest and metabolize
Excrete waste
Reproduce
Grow
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Survival Needs
The body is a very delicate machine and has needs that MUST be met in order to maintain life
The human body needs:
Nutrients, Oxygen, Water, Maintained Body Temperature, Appropriate Atmospheric Pressure
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Nutrients
Nutrients are taken in via our diets
They contain the chemicals used for energy and cell building
Carbohydrates, Proteins, Minerals, and Vitamins are all nutrients that play a vital role in our survival
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NutrientsHere are some
examples that are needed for our survival
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Oxygen
All of the nutrients that we take in are useless without oxygen
Chemical reactions that release energy from food requires oxygen
Oxygen is made available to the body by a combined effort of the cardiovascular and respiratory system
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Oxygen in the bloodstream
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Water
Water makes up 60-80 percent of our body mass
It is the single most abundant chemical in the body
Absorbed from foods and liquids and released by evaporation in the lungs and body excretions
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Body Temperature
Body temperature must be maintained at around 37 degrees Celsius (98.6 degrees Farenheit)
Metabolic reactions decrease with a lower body temperature and increase with a higher body temperature
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Atmospheric Pressure
Your body must be kept in an area where there is suitable atmospheric pressure.
Standard atmospheric pressure is 1.00 atms
If your body is subject to pressures too great or to little you can not properly perform the act of respiration (gaseous exchange).
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Atmospheric Pressure
SCUBA divers spend time in chambers called hyperbaric chambers to re-regulate their bodies to normal atmospheric pressure