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Cardiovascular System (Blood supply to Heart (Coronary Arteries (Left…

- - - - major branches
        
        Anterior interventricular artery
        
        circumflex artery
    - - major branches
        
        posterior interventricular artery
        
        marginal artery
  - - - cardiac muscle cells
        
        .pump blood through heart into blood vessels
        .striated
        .cylindrically shape, short
        intercalated discs
      - intercalated discs
        
        location: in cardiac muscle cells
        
        Function: bind adjacent cells together
        .transmit contractile to adjacent cell
        .gap junction allow ions pass through
- - - - serous pericardium
        (simple squamous epithelium, areolar C.T)
        
        parietal
        
        inner surface of fibrous pericardium
        
        visceral
        
        heart wall, lies on the heart
      - pericardial carvity
        
        .between parietal and visceral
        .serous fluid-slippery, lubricating
      - Fibrous pericardium
        
        .outer layer, strong, surround heart, keep heart in place, not overfilling with blood
        .dense connective tissue
        . from diaphragm to root s of large vessels
  - - - .cardial muscle bundles
    - - .simple squamous epithelium
        .lines heart chambers , valves
    - - .visceral layer of serous pericardium
        .serous membrane
        .infiltrated fat
  - - - pump deoxygenated into lungs
    - - oxygen-rich blood from lungs
    - - Pump blood through pulmonary artery to lungs
    - - Pump blood, delivery oxygen into body and tissues
- - - - .oxygenated blood from return from lungs
        .pump blood through out the body
    - - .receives oxygen-poor blood
        .pump blood to lung
        .pick up O2 -dispel CO2
- - - - draining blood from body into right atrium through coronary sinus
        
        blood flow from right atrium to right ventricles
        
        from right ventricles to right atrioventricular valve
        
        propelling blood through pulmonary semilunar valve
        
        into pulmonary trunk
        
        to lungs through pulmonary circuit for oxygenation
  - - - close heart valve: prevent back flow of blood into atrium
        
        closing valve cause vibration ( heart beat)
      - open heart valve: allow blood flow
    - - prevent back flow from artery to ventricles