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THE HUMAN BODY SYSTEM, The Respiratory System, The Excretory System, The…

- - - - Breaks down food into molecules the body can use.
        
        Molecules are absorbed into the blood & carried throughout the body (by the circulatory system).
        
        Wastes are eliminated from the body (by the excretory system)
    - - Mouth
        
        Esophagus
        
        Stomach
        
        Small Intestine
        
        Large Intestine
        
        Rectum
  - - - Heart: Hollow, muscular organ that pumps blood throughout the body.
      - Blood Vessels:
        
        Arteries: carries oxygen-rich blood away from the heart and to the body parts.
        
        Capillaries: where materials are exchanged between the blood and the body’s cells
        
        Veins: Carries oxygen-poor blood back to the heart
      - Blood
        
        Plasma: liquid part of blood
        
        Red blood cells: take up oxygen in the lungs and deliver it to cells
        
        White blood cells: the body’s disease fighters
        
        Platelets: cell fragments used in forming blood clots
- - - - It also removes carbon dioxide and water from the body.
- - - - most versatile and most comple
        
        sends out electrical signals that spur the body into immediate action.
        
        Functions:
        
        Receives information about what is happening inside and outside of the body.
        
        Directs the way your body responds to this information.
        
        Helps maintain homeostasis.
        
        Brain, Nerves, Spinal Cord
        
        CNS (Brain and Spinal Cord)
        
        PNS (Neurons)
  - - - Covers and protects the body to prevent water loss and keep out foreign particles.
        
        Keeps you in touch with the environment (nerve endings)
      - Regulates your body temperature
        
        Gets rid of wastes (sweat/perspiration)
- - - - Helps the body move
        
        Moves food through the digestive system
        
        Involuntary Muscles
        
        Smooth Muscle Tissue
        
        Inside many internal organs
        
        Cardiac Muscle Tissue
        
        found only in the heart
        
        Keeps the heart beating
        
        Voluntary Muscles
        
        Skeletal Muscle Tissue
        
        attached to bones and move bones using tendons
      - Muscle Action
- - - - Protects organs
        
        Produces blood cells
        
        Stores certain materials