Circulatory System

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Circulatory System

• VS 223
• Dr. Noland

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With what words will you describe this heart so
as not to fill a book Leonardo da Vinci
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Flow of Blood

• The circulatory system is a continuous closed
  system with high pressure and low pressure
  portions

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Layers of Heart Tisssue

• Endocardium
• Myocardium
• Epicardium- Visceral Pericardium
• Parietal Pericardium

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Intercalated Disks- Gap Junctions Desmosomes
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Arteries- thick walled contain smooth muscle
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Capallaries No smooth muscle 7 um diameter No
cell more than two cell widths from capillary
(.005) 5 of circulating blood in
capillaries Permeability of capillaries
vary Liver - Brain
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Lymph contains fat and proteins being returned
to the venous system Lacteals-
lymphatic vessels draining the digestive
tract Afferent Vessels Efferent Vessels
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Cortex Medulla
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Functions

• Adult
• Store RBCs
• Produce lymphocytes
• Store iron
• Destroy worn out RBCs
• Fetus
• Produce RBCs