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Homeostasis and human body systems

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Title: Homeostasis and human body systems Author: Owner Last modified by: Cheryl_Pitt Created Date: 8/4/2009 8:46:46 PM Document presentation format – PowerPoint PPT presentation

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Title: Homeostasis and human body systems


1
Homeostasis and human body systems
2
homeostasis
  • Maintenance of a stable internal environment
  • All living things must maintain homeostasis
  • What factors affect an organisms ability to
    maintain homeostasis In the environment?

3
How We maintain homeostasis
  • Our body is organized to maintain homeostasis

4
Learning Check
  • Start with any of the 11 body systems and fill in
    the organizer down to cells.

5
Human Body Systems Review
  • Follow along in your Human Body Book as we
    review. Only add notes as necessary.

6
Skeletal system
  • Organsall bones including skull, backbone, ribs,
    arm and leg bones
  • FunctionsProtects internal organs, allows
    movement by giving muscles something to pull on,
    holds us upright

7
Circulatory system
  • Organsheart and all blood vessels
  • FunctionsAbsorbs and carries nutrients
    throughout body picks up wastes and carries them
    to excretory organs

8
Respiratory sytem
  • OrgansPharynx, Larynx, trachea, lungs
  • FunctionsIntake of oxygen and removal of carbon
    dioxide from body

9
Digestive system
  • OrgansEsophagus, stomach, large and small
    intestines, liver and gall bladder
  • FunctionsTakes in food, breaks it down into
    molecules and absorbs nutrients

10
Nervous system
  • Organsbrain, spinal cord, nerves
  • FunctionsCoordinates movement, monitors internal
    state, coordinates involuntary body responses

11
Integumentary system
  • Organsskin, hair, nails
  • FunctionsProtective barrier against germs, helps
    maintain temperature and fluid balance

12
Immune system
  • OrgansSpecialized blood cells, lymph nodes
  • FunctionsDetects and destroys germs and abnormal
    cells to prevent disease and infection

13
Excretory system
  • OrgansKidneys, bladder
  • FunctionsRemoves wastes from blood and removes
    wastes from body

14
Reproductive system
  • OrgansOvaries, uterus, penis, testicles
  • Functionsto produce gametes (eggs and sperm) and
    enable reproduction

15
Muscular system
  • Organsskeletal muscle, cardiac (heart) muscle,
    smooth muscle (lines internal organs)
  • FunctionsEnables movement, pumps the blood from
    the heart, moves food through digestive system

16
Endocrine system
  • OrgansAll glands of the bodypituitary, thymus,
    adrenal, pancreas
  • FunctionsReleases hormones that control
    metabolism, growth and development

17
How do systems interact??Negative feedback
loops!!
  • Like a thermostat

18
Temperature control in our body
19
Negative feedback loops in our body
  • There are hundreds of negative feedback loops
  • All feedback loops respond to keep conditions
    within a narrow range of normal

20
Think Pair Share
  • Blood clotting is also controlled by a negative
    feedback loop. Your body detects an
    injury?accelerates reactions to allow the blood
    to clot?the injury is contained?the body stops
    the clotting process and begins repair
  • What would happen if this negative feedback loop
    failed to work properly?
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