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Cardiovascular System (Heart (Heart Membranes (Myocardium (Made of cardiac…

- - - - Made of dense irregular connective tissue; Covers the heart from the diaphragm to the roots of the large vessels; and keeps heart from over filling
    - - Visceral pericardium
        
        Closest serous membrane to the heart
      - Parietal pericardium
        
        Serous membrane farthest from the heart
      - pericardial cavity
        
        Filled with serous fluid that reduces friction between organs
    - - Made of cardiac muscle tissue
      - Has sarcoplasmic reticulum but very small terminal cisterns
      - Intercalacted discs, or fascia adherens, are like desmosomes in structure.
      - Has gap junctions
    - - Membrane that lines the heart. Made of Simple Squamous epithelial
  - - - Purkinje fibers are connected to the atrioventricular bundle. The AV node is located in the Right atrium, which is triggered by the sinoatrial node, or the pace maker. the AV dives down the interventricular septum, which splits off into two branches, then goes back up the heart wall at the apex.
    - - Pulmonary semilunar valve opens up to bring blood to the lungs
      - Aortic valve opens so the aorta can pump blood to the rest of the heart.
- - - - most proximal
      - Largest
      - Streches and recoils to propel blood away from heart
      - Ex. Aortas and its branches
    - - More muscle for its size than other artieries
      - Takes blood to organs and parts of organs
      - Can constrict and dialate
    - - Smallest artery
      - 1-2 layers of smooth muscles
      - can constrict and dialate.
  - - - Smallest of the veins
      - 1-2 layers of smooth muscle
    - - Has valves
    - - Gets blood to heart.
  - - - Most common
      - Has cleffs which make it leaky
      - Located in the CNS, Smooth and Skeletal Muscle, and lungs
    - - Has pores
      - High rate of exchange
      - Located in the small intestines, kidneys, choroid plexus, and endocrine glands
    - - Tranfer of whole cells and proteins.
      - Very widened
      - located in the spleen, liver, and red bone marrow
- - - - Created in red bone marrow
      - does not have a nucleus
      - Contains hemoglobin
        
        Hemoglobin binds with Oxygen
      - Is biconcave shaped; this shape increases surface area wich makes it easier to take and give oxygen
    - - Helps with immunity
      - neutrophil
      - Eosinophil
      - basophil
      - Monocytes
      - Lymphocytes
    - - Not cells
      - pieces of cytoplasm from megakarocytes.
        
        Megakarocytes
        
        Located in Bone marrow
        
        Involved with blood cloting