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Cardiovascular System (Heart (microscopic anatomy of myocardium (Fascia…

- - - - D.I.CT.
      - extends from diaphragm to roots of the large vessels
      - sac that encloses the heart
      - keeps heart in place
      - keeps heart from overfilling with blood
    - - Simple Squamous Epithelium and areolar C.T.
    - - between parietal and visceral
  - - - electrical signals through one cell to the next
    - - contain desmosome like junctions
      - bind cells together
  - - - muscle
      - Spiral shape
      - helps squeeze blood
    - - lines the heart
      - covers valves
      - Sim. squa. epi. and areolar C.T.
    - - serous membrane
  - - - Recieve Blood
      - No valves
      - Dromps through valves into ventricles because of pressure
    - - Contain Muscle
      - Functions to contract and pump blood out
  - - - in right atrium
      - generates electrical signal
    - - delay signal - while ventricles fill with blood
- - - - Most common
      - CNS, lungs, skin, skeletal and smooth muscle
      - least leaky of all capillaries
    - - Has pores
      - more leaky
      - high rates of exchange
        
        small intestine
        
        kedneys
        
        choroid plexus
        
        endocrine glands
    - - Has pores in the basement membrane
      - Large, Winding
      - exhange large things
        
        Proteins
        
        Whole cells
  - - - Smallest of the veins
      - still some exchange
      - 1-2 layers of smooth muscle
    - - smooth muscle cell in tunica externa
      - Includes vasa vasorum
      - Inludes Nervi Vasorum
    - - valves are important
      - Fewer elastic fibers
      - Valves are closed
    - - Only has Tunica externa, media and intima
  - - - Largest of the 3 arteries
      - have the most elastic fibers
      - act like a pump
      - found in aorta, pulmonary trunk and large branches from the aorta
    - - more muscle than any other artery
      - take blood to organs or parts of organs
    - - smallest, most distal
      - 1 - 2 layers of muscle
      - Able to change diameter to regulate blood flow
- - - - Globulin
        
        antibodies
        
        transporters
      - Fibrinigin
        
        involved in blood cloting
      - Albumin
        
        helps keep water in blood vessels
  - - - sugar
      - hormones
      - ions
      - vitamins
      - amino acids
      - Lipids