The Organization of the Human Body

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The Organization of the Human Body

• Intro to the Human Body Chapter 1

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The Human Body is organized into 11 systems

• These 11 systems are responsible for maintaining
  homeostasis within the body.
• Homeostasis is a condition in which the bodys
  internal environment remains within certain
  physiological limits (98, 120/80, etc)

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The Eleven Principle Body Systems, the organs
involved and their function

• Can be found on page 4 in your textbook

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For the bodys cells to survive, the interstitial
fluid of the body must remain in homeostasis-
this means balancing concentration of

• Gases (O2, CO2, etc.)
• Nutrients
• Ions like Cl-, K, Na, etc.

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Stress upsets Homeostasis

• Stress can come from external factors like
  extreme heat or cold, or lack of oxygen, etc.
• Stress can also originate internally from stimuli
  like high blood pressure, illness, bad thoughts,
  etc.

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The Body Possesses Devices that Work to Maintain
Homeostasis

• These devices are all under the control of the
  nervous system.
• The nervous system detects problems in the body,
  then sends signals to corrective devices that
  then return the body to homeostasis.

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The body maintains homeostasis through positive
and negative feedback
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Body organs and systems are contained within the
two basic body cavities

• The dorsal cavity- contains the cranial cavity
  (skull) and vertebral column
• The ventral cavity- made up of the thoracic and
  abdominopelvic cavities.
• See Fig 1-7 on page 13

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Both the Thoracic and Abdominopelvic Cavities are
further subdivided

• See exhibit 1.3 on page 11

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Navigating the body using anatomical and
directional terms

• Make flashcards for
• All words from balloon fish exercise
• All words from exhibit 1.1 on page 12
• All organ systems and their function

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Plus the following terms from Fig 1.3 on page 8

• Cranial, cephalic, cervical, orbital, lumbar,
  oral, nasal, thoracic, oral, otic, and buccal