INTRODUCTION TO HUMAN BIOLOGY pp. 907-910

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INTRODUCTION TO HUMAN BIOLOGYpp. 907-910
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• cells ? tissues? organs ? organ systems

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BODY TISSUES
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• muscle contract in coordination upon
  stimulation (skeletal, cardiac, smooth)
• nervous receive and transmit information and
  signals (made of cells called neurons)
• epithelial line surfaces of bodies, cavities,
  canals
• connective
• 1. bone, cartilage, tendons, blood
• 2. cells surrounded by extra-cellular,
  non-
• living tissue

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ORGANS

• tissues working together

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ORGAN SYSTEMS

• Skeletal protection and support

• Muscular support and movement

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• Respiratory gas exchange

• Circulatory transport of gases, nutrients,
  waste, and chemicals to all parts of the body.

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• Integumentary (skin) protection

• Immune fights pathogens

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• Nervous regulation, conduction, and coordination

• Endocrine controls body function via chemical
  messengers.

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• Digestive breakdown and absorption of food

• Excretory removal of liquid and solid wastes

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• Reproductive production of sex cells
  (offspring)

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BODY CAVITIES

• spinal, cranial, thoracic, diaphragm, abdominal,
  pelvic

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Feedback Loops

• Positive (Rarer)
• The response of the system creates more of the
  same response
• Run on the Bank, Allergic Reaction, Awful sound
  from a speaker
• There is a rumor that a bank is going out of
  business. People get scared and start going to
  the bank to take out their money. People see
  that the bank is getting weak because of all the
  people taking out their money so they go to take
  their money. This happens more and more until
  the bank has no more money and goes out of
  business.

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• Negative Feed back
• The response of the system causes the action to
  stop
• Thermostat, Insulin
• When you set your thermostat to heat it turns the
  heat on and then the room heats up. When the
  room reaches a certain temperature, the
  thermostat reacts and turns off the heater. The
  room then cools down and the cycle reapeats.

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Homework

• Read p 907 -910
• Problems p 910 1-6
• Body Tissues Worksheets