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Blood System - Coggle Diagram

- - - - Branches off into a capillary bed
        
        (a net of capillaries)
        
        Is is the level of capillaries that all exchanges of nutrients and waste between the blood and body cells occur
        
        The capillary bed then merges into venules
        
        (thinnest veins)
        
        Which merge into thicker and thicker veins until they reach the heart
- - - - Hormone that increases the heart rate
      - released in situations of stress to prepare the animal for a fight-or-flight response
- - - - a) atria contract --> increase in pressure inside atria
  - - - increase in pressure inside venricles
      - atrioventricular valves close (1st heart sound)
      - Rapid increase in pressure inside ventricles
    - - increase of pressure inside aorta
        
        (equals pressure inside ventricles)
    - - end of systole/beginning of diastole
    - - pressure inside atria drops as blood flows to ventricles
- - - - the sinoatrial node (SA node)
        
        its cells are the first to depolarize. It sends out an electrical signal that stimulates contraction of both atria
        
        it also sends a signal to the atrioventricular node (AV node) to make it send its signal
        
        AV node: sends electrical signals to trigger the contraction of both ventricles
- - - - Tissues (capillaries)
        
        Veins
        
        Back to heart
- - - - Medium Artery
        
        Small Artery
        
        Arteriole
        
        Capillary
        
        Venule
        
        Small Vein
        
        1 more item...