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Body Systems


Body Systems and how they work together There are 10 body systems: Skeletal Muscular Digestive Respiratory Circulatory Endocrine Immune Excretory Reproductive Nervous ... – PowerPoint PPT presentation

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Title: Body Systems

Body Systems
and how they work together
There are 10 body systems
  • Skeletal
  • Muscular
  • Digestive
  • Respiratory
  • Circulatory
  • Endocrine
  • Immune
  • Excretory
  • Reproductive
  • Nervous

The Skeletal System
  • The skeletal system is made up of 206 bones.
  • The purpose of the skeletal system is to give our
    body shape and support and to protect our vital
    organs. (Ex our brain is protected by our
    skull, our heart and lungs are protected by our
    ribcage and sternum)
  • Your skeletal system is separated into 2
    sections axial and appendicular
  • The axial skeleton consists of bones that
    protect vital organs such as skull, ribcage,
    sternum, vertebral column
  • The appendicular skeleton consists of bones that
    connect appendages to your axial skeleton such
    as arm bones (humerus, radius, ulna) and leg
    bones (femur, tibia, and fibula)
  • Inside of our bones is bone marrow, which is
    responsible for making red blood cells

The Skeletal System
The Muscular System
  • There are over 650 individual muscles that are
    attached to our skeletal system.
  • The main job for the muscular system is to
    provide movement for our bodies.
  • Our bodies are made up of 2 different types of
    muscles Voluntary and Involuntary muscles
  • Voluntary muscles are muscles we can control .
    Also called skeletal muscles they include biceps,
    triceps, quadriceps, etc
  • Involuntary muscles are muscles that we cannot
    control. They are controlled by our nervous
    system and hormones. (Ex cardiac muscle,
    smooth muscle, etc)

The Muscular System
The Digestive System
  • Our digestive systems main job is to break down
    the food we eat into parts that are so tiny that
    the useful pieces can be absorbed into our
    bloodstream and sent throughout our bodies and
    get rid of any leftover parts of the food that
    our bodies cannot use.
  • The digestive system is made up of the following
    organs esophagus, stomach, liver, gall bladder,
    pancreas, small intestine, and large intestine.
  • The stomach, liver, gall bladder, and pancreas
    are all responsible for hitting the food we eat
    with chemicals that break it down into tiny
    pieces that our bodies can use.
  • The stomach produces gastric juices such as
    hydrochloric acid and enzymes that break food
    down for 3-4 hrs into a creamy liquid.
  • The pancreas and liver produce chemicals that
    separate fats, carbohydrates, and proteins from
    food for our bodys use.
  • The small intestine is where the food actually
    passes into the bloodstream after it has been
    broken down by chemicals. Whatever the body
    cannot use is passed into the large intestine and
    eventually exits the body.
  • Your small and large intestine together are
    over 22 feet long!

The Digestive System
The Nervous System
  • The nervous system is made up of your brain,
    spinal chord, and nerves. The nervous system is
    known as the bodys control system.
  • The nervous system sends, receives, and processes
    impulses that are sent throughout your body that
    tell your muscles and organs what to do.
  • There are 2 main parts of the nervous system
  • The central nervous system is composed of your
    brain and spinal chord.
  • The peripheral nervous system includes all of the
    nerves that transmit messages from your brain and
    spinal cord to your muscles, organs, and glands.

The Nervous System
Respiratory System
  • The respiratory system is responsible for
    bringing air into the body and for removing
    carbon dioxide.
  • The respiratory system is composed of the nose,
    trachea, and lungs.
  • The trachea branches into the bronchial tubes,
    then to bronchioles, and then into the air sacs.
    Oxygen passes through the walls of the air sacs
    and into the bloodstream.

The Respiratory System
The Circulatory System
  • The circulatory system is the bodys transport
    system. It is made up of a group of organs that
    transport blood throughout the body.
  • The circulatory system is composed of the heart,
    arteries, veins, blood vessels, and capillaries.
  • Capillaries deliver oxygen and nutrients to the
    bodys cells and removes carbon dioxide, water,
    and waste.

The Circulatory System
The Endocrine and Immune Systems
  • The endocrine system is made up of a group of
    glands that produce hormones that control
    metabolism, growth, and sexual development.
  • The immune system is our bodys defense system
    against infections and diseases that come from
    viruses and bacteria.

The Immune System
How do our body systems work together?
  • Here are a few examples of how body systems work
    together to do certain bodily functions
  • skeletal muscular- provide movement and
  • digestive circulatory- digestive system breaks
    down large molecules into small molecules to
    enter the cell. circulatory system carries small
    molecules to the cell.
  • muscular nervous- helps you move around and
    interact with the environment.
  • nervous endocrine- control coordination of many
    of the body's activities respond to and send
    messages to cells throughout the body.
  • circulatory respiratory- exchange gases between
    body cells and the environment.
  • excretory circulatory- circulatory brings blood
    to the excretory system to be cleaned and

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