DIGESTION AND NUTRITION

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DIGESTION AND NUTRITION
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Organs

• Organs are groups of tissues that are specialized
  to carry out specific functions
• Some examples are the stomach, lungs. Kidneys and
  heart.

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Organ System

• An organ system is a group of organs working
  together that have a similar function.
• The digestive system is composed of organs such
  as the esophagus, stomach, small intestine, large
  intestine, liver and pancreas.

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Organ System

• Organ systems within organisms work together
  closely to ensure proper functioning.
• For example, the digestive system could not
  complete its job if the circulatory system did
  not deliver the nutrients to the rest of the body.

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Technology and Organ Systems

• X-rays have been used since 1895 to view bones
  and soft tissue was first viewed in 1898.
• Today we use barium to stain organs which allows
  x-rays to penetrate and produce a white image of
  the organs on a black background.

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CAT Scans

• A computerized axial tomography scan, commonly
  referred to as a CAT scan, produces pictures of
  an object from many different angles using x-ray
  technology.
• The photos are entered into a computer which can
  reassemble the pictures to show 3-D images. It
  can distinguish the difference between gases,
  liquids and solids and is very useful for
  diagnosing head injuries.

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Nuclear Imaging

• Nuclear imaging provides doctors with views of
  beating hearts or allows them to detect bone
  cancer without the use of surgery.
• It uses radiation that emits from within the body
  to produce information about the function of the
  organ, not just its structure.

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Magnetic Resonance Imaging

• MRI technology works by using the spinning motion
  of the nucleus of an atom to produce an image of
  the internal structures of the human body.
• These images can show if organs are functioning
  properly and they can also determine if tumours
  are cancerous.

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CONCLUSION

• All of these technologies can be used to monitor
  organs and organ systems within the human body.
• They are used as diagnostic tools to provide
  information about the structure and function of
  organs and organ systems.