Body Systems

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Body Systems
and how they work together
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There are 10 body systems

• Skeletal
• Muscular
• Digestive
• Respiratory
• Circulatory
• Endocrine
• Immune
• Excretory
• Reproductive
• Nervous

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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
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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
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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!

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The Digestive System
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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
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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
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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
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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
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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
  support.
• 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
  filtered.

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