TOPIC 6 : Body systems in humans - PowerPoint PPT Presentation

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TOPIC 6 : Body systems in humans

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The Digestive System Food enters the body through the mouth Food is broken down in the mouth, stomach and intestines Unused food is expelled as waste – PowerPoint PPT presentation

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Title: TOPIC 6 : Body systems in humans


1
TOPIC 6 Body systems in humans
  • The Digestive System
  • Food enters the body through the mouth
  • Food is broken down in the mouth, stomach and
    intestines
  • Unused food is expelled as waste
  • Digestive System Cartoon Assignment
  • Respiratory System
  • We inhale and bring in oxygen
  • We exhale and get rid of waste carbon dioxide
  • The respiratory system is responsible for gas
    exchange
  • Respiratory System Drawing Assignment
  • Circulatory System
  • The circulatory system transports food and oxygen
    through the body
  • Made of the heart, blood and blood vessels
  • Circulates blood around the body to deliver food
    particles, dissolved gas and other materials to
    cells
  • Also takes away waste material from the cells
  • Circulatory System Drawing Assignment

2
  • Nervous System
  • Coordinates and controls the actions of the
    organs and organ systems
  • Detects, processes and responds to stimuli in
    the environment
  • Excretory System
  • Removes wastes from the system

3
  • Digestive System
  • Mouth Food broken down by chewing and chemical
    action of saliva.
  • Salivary Glands - Saliva contains enzymes that
    break down carbohydrates into smaller molecules.
  • Esophagus - The esophagus is a long tube that
    uses rhythmic, wave-like muscle movements (called
    peristalsis) to force food from the throat into
    the stomach.
  • Stomach - Food in the stomach is partly digested
    and mixed with stomach acids
  • Liver - Makes bile which breaks down fats and
    some blood proteins. Helps the small intestine in
    digestion.
  • Gall Bladder - It stores and releases bile into
    the small intestine.
  • Pancreas - Enzymes from the pancreas help in the
    digestion of carbohydrates, fats and proteins in
    the small intestine.
  • Small Intestine bile, pancreatic enzymes, and
    other digestive enzymes produced by the inner
    wall of the small intestine help in the breakdown
    of food. Most food is absorbed here.
  • Large Intestine - The large intestine is
    responsible for absorption of water and excretion
    of solid waste material.
  • Rectum Feces are stored here.
  • Anus Where feces exits the body.

4
  • Nervous System
  • Brain - It helps to control all of the body
    systems and organs, keeping them working like
    they should. The brain also allows us to think,
    feel, remember and imagine.
  • Spinal Cord - The brain communicates with the
    rest of the body through the spinal cord and the
    nerves. Information passed through the spine
    tells the body what to do and when to do it.
  • Nerve Cells - Neurons carry messages in the form
    of a electrical impulses. The messages move from
    one neuron to another to keep the body
    functioning.

5
  • Excretory System
  • Kidney Cleans the blood of waste products.
    Waste is passed out your body in urine.
  • Ureter Takes urine from the kidney to the
    bladder.
  • Bladder Stores urine until it is passed out the
    body in urine.
  • Urethra Urine passes from the bladder to the
    urethra on the way out of the body.

6
  • Respiratory System
  • Larynx Place where moving air being breathed in
    and out creates sounds
  • Trachea This is the windpipe, or the passage
    leading from the mouth and throat to the lungs
  • Lungs The lungs perform respiration or gas
    exchange
  • Bronchi or Bronchus The two main tubes of the
    lungs
  • Bronchioles The smaller divisions of the
    bronchi
  • Alveolus The very small air sacs where breathed
    in air goes
  • Diaphragm Strong wall of muscle that separates
    the chest cavity from the abdominal cavity

7
  • Circulatory System
  • Heart The bodys blood is circulated throughout
    the body by the heart
  • Veins Veins carry blood to the heart. Veins
    carry dark red blood that doesnt have much
    oxygen
  • Arteries Arteries carry blood away from the
    heart. Arteries carry bright red blood that is
    high in oxygen
  • Blood Carries food and oxygen to cells as well
    as carrying wastes away from cells. Blood also
    carries disease fighting white blood cells
    through the body. It also helps maintain constant
    body temperature.
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