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LAB_ anatomy of the mink part 3_ Digestive system

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					The Circulatory System
  Structure (Anatomy) and Function (Physiology)
Heart




(Organ)
Heart
Heart

      Structure               Function
• 4 chambered           • To pump
  muscle (cardiac         deoxygenated
  muscle)                 blood to the lungs
• A septum divides      • To pump
  the right and left      oxygenated blood
  halves of the heart     to the body
• The pacemaker is        tissues
  a group of            • Contractions are
  specialized cells       controlled by
  that generate           electrical impulses
  electrical impulses
Superior Vena Cava
Superior Vena Cava
Superior Vena Cava

     Structure                Function
• Large vein            • Returns
• Less smooth             deoxygenated
  muscle than             blood from the
  arteries, but veins     head and arms
  have valves to          back to the heart
  prevent backflow        (specifically, the
                          right atrium)
Inferior Vena Cava
Inferior Vena Cava
Inferior Vena Cava

     Structure               Function
• Large vein            • Returns
• Less smooth             deoxygenated
  muscle than             blood from the
  arteries, but veins     body and legs
  have valves to          back to the heart
  prevent backflow        (specifically, the
                          right atrium)
Aorta




         (coming
        from left
        ventricle)
Aorta

     Structure             Function
• Large artery        • Carries
• Thick layer of        oxygenated blood
  smooth muscle         away from the
  that helps the        heart (specifically
  vessel contract       from the left
  (“squeeze” blood)     ventricle) to the
                        body tissues
Coronary arteries and veins




   (Blood vessels)
Coronary Arteries and Veins

     Structure              Function
• Smaller arteries   • Coronary arteries
  and veins on the     supply the heart
  surface of the       muscle with
  heart (note:         oxygenated blood
  coronary means     • Coronary veins carry
  heart!)              deoxygenated
                       blood back to the
                       chambers of the
                       heart
Right atrium
Heart-Right Atrium

     Structure                Function
• Smaller, upper        • Deoxygenated
  right (as in the        blood from the
  specimen’s right)       body returns here
  chamber in the          via the inferior
  heart                   and superior
• Separated from          vena cava
  the right ventricle
  by the tricuspid
  valve
Right ventricle
Heart-Right Ventricle

    Structure               Function
• Larger, lower      • Pumps blood to the
  right (as in the     pulmonary
  specimen’s           arteries* which
  right) chamber       carry
  in the heart         deoxygenated
• Separated from       blood to the lungs to
  the pulmonary        get rid of carbon
  arteries by the      dioxide and pick up
  pulmonary            oxygen
  valve                (*the only arteries that carry
                           oxygen-poor blood!)
Left atrium
Heart-Left Atrium

     Structure                Function
• Smaller, upper left • Oxygenated
  (as in the            blood from the
  specimen’s left)      lungs return here
  chamber in the        via the
  heart                 pulmonary veins
• Separated from        (the only veins that carry
                        oxygen-rich blood!)
  the left ventricle
  by the mitral
  (bicuspid) valve
Left ventricle
Heart-Left Ventricle

     Structure               Function
• Larger, lower left   • Pumps blood to
  (as in the             the aorta which
  specimen’s left)       carries
  chamber in the         oxygenated blood
  heart                  to the body to
• Separated from         drop off oxygen
  the aorta by the       and pick up carbon
  aortic valve           dioxide
Thymus gland
Thymus Gland

      Structure              Function
• Triangular shaped    • Produces T-
  organ that sits on     lymphocytes
  top of the heart       (blood cells) as
                         part of the
                         immune system
                         (not circulatory!)
Heart




(Organ)

				
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posted:4/25/2013
language:English
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