Points of Interaction between Body Systems

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Points of Interaction between Body Systems
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SIMPLE
Cells
Tissues
Organs
Organ Systems
COMPLEX
Organism
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Things your Cell needs to get daily
From your respiratory system Oxygen

• From your digestive system
• Nutrients
• Minerals
• Lipids Carbohydrates
• Protiens
• Water

Enzymes are proteins that help speed up chemical
reactions and help your body get these things.
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Cellular Respiration

• Chemical reaction that occurs in the cells once
  the cell gets nutrients, water, enzymes
  (proteins) and oxygen causing energy to be
  released.
• Chemical Reaction-
• Nutrients oxygen --? energy water CO2

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Then the Cell needs to get rid of

• C02 using the respiratory system.
• Extra water, minerals, and other cellular waste
  though the excretory system.
• This process is called EXCRETION.

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Kidneys

• Part of the urinary system that removes excess
  water.
• Nephrons are the filtering parts of the kidney.

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Points of Interaction

• Food leaves the digestive system and enters the
  circulatory system in the small intestine at
  points called villi. Process called absorption.

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Points of Interaction

• Alveoli- exchange
• CO2 and oxygen
• from the bloodstream
• back into the
• respiratory system

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Homeostasis

• Homeostasis- Process by which the body maintains
  a stable internal environment

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How do you return to homeostasis?
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Negative Feedback

• when a change in the normal state occurs a
  negative feedback mechanism causes the body to
  return to the normal state. Most common way for
  the body to return to homeostasis.
• Examples
• You get overheated, so your body starts to sweat,
  and you cool back off

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Negative Feedback

• Blood pressure gets too high, so your heart beats
  slower, and blood pressure returns to normal.

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More examples

• Your glucose (sugar) levels in your blood get to
  high, so the pancreases secretes insulin, causing
  your bodys cells to store the glucose, until
  levels return to a normal level.

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Positive Feedback

• Positive Feedback- when a change in the normal
  state occurs the positive feedback mechanism
  causes an even greater change. -rare in normal
  healthy bodies.
• .

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Positive Feedback

• A blood vessel is cut, chemicals are released.
  Platelets begin to stick to the walls. This
  causes MORE chemicals to be released and MORE
  platelets to stick until the cut is sealed

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Positive Feedback

• The uterus starts contacting causing the baby to
  enter the birth canal. When the brain notices
  this change it causes the uterus to contract MORE
  until the baby is pushed out.