the Human Body Systems and homeostasis

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the Human Body Systems and homeostasis
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Homeostasis

• Process by which organisms maintain a relatively
  stable environment
• Ex Billy was riding his bike and scrapped his
  knee. How did his body maintain homeostasis after
  his accident?

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Homeostasis and the Human Body

• There are 11 body systems
• How do these systems maintain homeostasis?
• What happens if one or more of these systems
  function incorrectly?

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Organization of the Human Body

• 1. cells
• 2. tissue
• 3. organs
• 4.organ systems

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Skeletal System

• STRUCTURES Bones, Cartilage, Ligaments, and
  Tendons
• FUNCTION Supports the body, protects internal
  organs (lungs and heart)
• EX Penny fell out of her tree house and broke
  her ankle. What would her body do so that her
  skeletal system can maintain homeostasis?

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Integumentary System

• STRUCTURE Skin, Hair, Nails, Sweat and Oil
  Glands
• FUNCTION A barrier against infection and injury,
  helps regulate body temperature and protection
  from suns UV radiation
• EX When Jenna started working out, her body
  temperature began to rise. What did her
  integumentary system do so that her body could
  maintain homeostasis?

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• top 2 layers of skin
• 1) Epidermis outermost layer
• Has melanin (pigment that colors the skin helps
  protect body cells form damage by solar
  radiation)
• 2) Dermis 2nd principal layer of skin
• Contains blood vessels, nerves, hair follicles,
  sweat glands.

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Respiratory System

• STRUCTURE Nose, Trachea, Lungs, Airways
• FUNCTION Allows gas exchange. Provide oxygen
  needed for cellular respiration and remove carbon
  dioxide from the body
• EX Aaron decided he wanted to ride his bike.
  After riding for about 10 minutes, what did his
  respiratory system do so that his body could
  maintain homeostasis?

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Excretory System

• STRUCTURE Kidneys, Ureters, Bladder, Urethra
• FUNCTION Eliminates waste products from the
  body.
• EX Stephanie had four cups of Gatorade. What
  will her excretory system do so that her body can
  maintain homeostasis?

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• Structures/Organs of the Excretory System
• 2 kidneys- filter blood to remove wastes from it
  (maintaining homeostasis of body fluids)
• 2 Ureters- passageway from kidney to bladder
• Bladder- where urine is stored.
• Urethra- where urine exits

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Muscular System

• STRUCTURES Smooth, Skeletal, and Cardiac Muscles
• FUNCTION Works with the skeletal system to
  provide movement. Helps circulate blood, and move
  food through digestive system
• EX Jess decided that she wanted to be a
  professional body builder. Due to the increase of
  weight she is lifting, what will her body do so
  that she can maintain homeostasis?

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Circulatory System

• STRUCURE Heart, Blood Vessels, Blood
• FUNCTION Brings oxygen, Nutrients, and Hormones
  to cells. Removes cellular waste
• Paul decided that he was going to run a race.
  After fifteen minutes into the race he needs to
  get more oxygen to his cells. What will Pauls
  circulatory system do so that his body can
  maintain homeostasis?

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• Blood is a tissue composed of fluid, cells,
  fragments
• The fluid portion of blood is called plasma
• Plasma makes up about 55 of the total volume of
  blood

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• Review systems..

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Nervous System

• STRUCTURE Brain, Spinal Cord, Nerves
• FUNCTION Recognizes and coordinates the bodys
  response to changes in internal and external
  environments (senses)
• EX Josh fell down and broke his arm. How did his
  nervous system tell him that his body was not
  maintaining homeostasis?

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Digestive System

• STRUCTURE Mouth, Esophagus, Stomach, Small and
  Large Intestine, Rectum
• FUNCTION Coverts food into simpler molecules and
  that can be used by the cells of the body,
  absorbs food, and eliminates waste
• EX Ben ate a large meal for dinner. He ate so
  much food that he thought his belly was going to
  pop the button off of his pants. What did Bens
  digestive system do so that he can maintain
  homeostasis?

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Endocrine System

• STRUCTURE Hypothalamus, pituitary, thyroid,
  pancreases, ovaries, testes
• FUNCTIONS Controls growth, development, and
  metabolism. Helps to maintain homeostasis
• Jessica ate a whole cookie cake. Her body is
  overloaded with sugar. What will her endocrine
  system do so that her body can maintain
  homeostasis?

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Reproductive System

• STRUCTURES Testes, Penis, Vagina, Ovaries,
  Fallopian Tubes
• FUNCTION Produces reproductive cells protects
  and nurtures developing embryo.
• EX Jerod and his wife where trying to reproduce.
  After several attempts, the doctor said that
  Jerod has a low sperm count because his pants
  where to tight. What can Jerod do so that his
  reproductive system can maintain homeostasis?

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Lymphatic/Immune Systems

• STRUCTURE White blood cells, spleen, lymph
  nodes, lymph vessels
• FUNCTION Helps protect the body from disease
  collects fluids lost from blood vessels and
  returns it to the circulatory system
• EX Jack cut his finger and it started to develop
  an infection. What did his Immune system do so
  that his body could maintain homeostasis?