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Circulatory System (Pathology Connection: (Electrical Disturbances…

- - - - condition where heart cannot move blood efficiently
  - - - cause: bone marrow dysfunction, low levels of iron or vitamins
      - common symptoms: pale skin, mucous membranes, and nail beds, fatigue, muscle weakness
  - - - high WBC count
    - - high levels of blood cells are produced due to bone marrow cancer
    - - low WBC count
- - - - transports oxygen from lungs , nutrients from digestive system , and hormones from endocrine glands
    - - regulate variety of levels in body to help maintain homeostasis by ensuring pH, helps regulat body temp and fluid balance
    - - protects us from invasion and infection by pathogens and texins
  - - - responsible for blood ability to clot
    - - polymorphonuclear granulocytes: originate from red bone marrow
        
        Basophils
        
        Eosinophils
        
        Neutrophils
      - Mononuclear cells: originate from lymphoid and myeloid tissue
        
        monocytes: found in infection
        
        Lymphocyte: protects us from infection using antibiotics
    - - lack nuclear response
      - doughnut shaped
      - helps with transporting oxygen
- - - - collects the blood after it the trip around the body
      - superior and inferior vena cava take the blood here
      - travels through the atrioventricular valve into the right ventricle
- - - - arteries
        
        carry blood away from the heart
      - veins
        
        carry blood toward the heart
- - - - middle layer, thick, smooth muscles, elastic tissue and collagen
    - - outside layer, fibrous tissue
    - - innermost layer
- - - - located in wall of right atrium, near entrance of superior vena cava, 70-80 impulses per minute
    - - located at point where atria and ventricles meet, 40-60 beats per minute