Humans as a System
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Humans as a System



Mr. Zajiczek's presentation on humans as a system.

Mr. Zajiczek's presentation on humans as a system.



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Humans as a System Humans as a System Presentation Transcript

  • The Human System
    A quick look at homo sapiens as a system.
  • Series of Subsystems
    Humans are a complex set of sub-systems
    Each system is interconnected
    The continued function of each system is required for humans to stay alive
    The first system is the circulatory system
  • Circulatory System
    • Transports blood
    • Oxygenates blood via the lungs
    • Cleans blood through the kidneys
    • Delivers oxygen to the brain
    • Transports nutrients from digestion
    • Delivers nutrients to muscles
  • Circulatory System Structure
    The circulatory system consists of a closed loop
    Contains ~5 – 6 litres of blood
    Works closely with the digestive system
    If all vessels were laid end to end it would be over 100 000 km long!
    (that is two and a half times around the earth)
  • Muscular System
    Moves the body –
    Pumps the circulatory system –
    Protects vital organs –
    Allows humans to capture food –
    Allows humans to flee from danger –
    Allows humans to relocate –
  • Muscular System Structure
    Three types: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles
    Skeletal muscles, like your bicep or quadricep, help us move
    Heart muscles pump blood through or circulatory system
    Smooth muscles move automatically, like your iris dilation muscles or your bowels
  • Nervous System
    • Regulates all bodily functions
    • Controls muscular/circulatory systems
    • Initiates fight or flight response
    • Creates thought
    • Receives and interprets stimuli
    • Communicates via electricity
  • Nervous System Structure
    The nervous system consist of millions of tiny wire-like objects called neurons
    Imagine them as wires that connect things like your brain to your fingers
    Your brain sends and receives signals to and from other parts of your body
    Regulates things like temperature, hunger etc.
  • Skeletal System
    Supports all other systems –
    Protects organs and vital systems –
    Houses spinal cord –
    Facilities eating (Jaw/Teeth) –
    Attaches to muscular system –
    Allows for locomotion –
  • Skeletal System Structure
    Think of your skeleton as the frame of a house or a building
    All the girders, beams and wood frames are like your skeleton
    Helps support our bodies and protect our organs (like our heart)
    Imagine someone without a skeleton (YUCK!)
  • Digestive System
    • Converts food to energy
    • Introduces nutrients into blood
    • Filters toxins out of food
    • Provides energy to other systems
  • Digestive System Structure
    The digestive system is like a processing plant
    Food goes in the mouth and is chewed up by our teeth
    We swallow the food where it goes into our stomach
    Our stomach breaks it down further
    Our intestine processes the food for nutrients
    We expel the waste
  • Interconnected
    Each of those systems is interconnect
    Without one, the others would not function
    Without any of them, we would die
    Very complex systems with more subsystems
    Too many to list
  • References