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Cardiovascular system (Heart (Microscopic Anatomy of myocardium (composed…

- - - - Parietal Pericardium
        
        Outer layer
      - Visceral Pericardium
        
        Inner layer
      - composed of simple squamous ET and little of areolar CT
    - - Filled with serous fluid which gives lubrication and free mov't of the heart
      - found between the two layers of serous pericardium
    - - composed of dense irregular connective tissues
      - sac contains heart and places heart in place, protection of the heart, keep the heart from overfilling
  - - - muscular layer, composed of cardiac muscle
        
        middle layer
    - - covers the heart and the heart valves
      - composed of simple squamous ET and areolar CT
    - - composed of simple squamous ET and little of areolar CT
      - Outer layer
  - - - branched muscle
      - has intercalated discs
        
        (desmosomes like structures)fascia adherens
        
        (electrical signals)gap junction
  - - - Tricuspid valva
        
        carries deoxygenated blood to the lung via pulmonary trunk
      - Bicuspid/Matrial Valve
        
        carries Oxygented blood
  - - - also called Peacemaker
    - - Also called HIS
- - - - keeps the water in bld vessels
    - - immunity of the blood vessels
    - - blood clotting
  - - - white blood cells
        
        Basophils
        
        lympohcyte
        
        eosinophils
        
        moncytes
        
        Neutrophils
    - - plateletes
    - - red blood cells
      - transport O2,
      - Bags of Hg,which contains Fe
- - - - veins(middle veins)
        
        found in heart valves
        
        compsed of elastic fibers which is less than arteries
      - venules
        
        smallest veins similar to capillaries
        
        function as exchange of materials
        
        composed of 1-2 layers of smooth muscles
      - large veins
  - - - fenstrated
        
        more leaky
        
        has pores which makes it to have high rate of exchange
        
        located in liver, small intestine, choroid plexus and endocrine glands
      - sinusoid
        
        largest pore
        
        exchange of large materials like proteins and whole cells
        
        located in liver, spleen and red bone marrow
      - continous
        
        most common
        
        located in CNS,skin,lung,skeletal muscle and smooth muscle
        
        least leaky
  - - - elastic/conducting artieries
        
        found in large bld vessls like aorta,pulmonary trunk, all other major large branches of aortic arch
        
        composed of elastic fibers
        
        most proximal to the heart
      - muscular artieries
        
        has many muscles due to its size, take blood to organs and organ parts
      - arterioles
        
        smallest artieries
        
        most distal to the heart
        
        composed of 1-2 layers of smooth muscle