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Cardiovascular System (Heart (Conduction System (1) SA - Sinoatrial Node…

- - - - Dense Irregular CT
      - From diaphragm to roots of large vessels
      - Keeps the heart in place
      - Keeps heart from overflowing
    - - Parietal
        
        Made of simple squamous epithelium + areolar CT
      - Visceral
        
        Made of simple squamous epithelium + areolar CT
  - - - visceral pericardium - serous membrane
    - - Muscle - spiral shape - helps squeeze blood out - ventricles
    - - Lines the heart and covers valves - simple sq. epithelium + areolar CT
  - - - facia adherens - desmosomes - like structures
      - Gap junctions - electrical signals will pass from one cell to the next
  - - - Bicuspid
      - Tricuspid
    - - Aortic
      - Pulmonary
  - - - In right atrium, uses gap junctions to spread signal
    - - Delay signal while ventricles fill with blood
- - - - Largest arteries
      - Able to move large amounts of blood
      - Most elastic fibers
      - Aorta, Pulmonary trunk
      - Large branches from aorta
    - - For its size, it has more muscle than other arteries
      - Take blood to organs/parts of organs
    - - Smallest, most distal
      - 1-2 layers of smooth muscle
      - Changing diameter to regulate blood flow
  - - - Most Common
      - CNS, lungs, skin, skeletal muscle, smooth muscle
      - Least leaky
    - - "windows" - pores
      - more leaky
      - high rates of exchange
      - Small intestine, Kidneys, choroid plexus, endocrine glands
    - - Large, windowing
      - Exchange things as large as proteins, whole cells
      - Liver, red bone marrow, spleen
  - - - Smallest of the veins
      - Much like capillaries
      - Still some exchange
      - 1-2 layers of smooth muscle
- - - - Red Blood Cells
    - - Neutrophil
      - Eosinophil
      - Basophil
      - Lymphocyte
      - Monocyte
    - - Platelets