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flow of blood through a capillary bed and capillary filtration,…

- - - - terminal arterioles
        
        metarterioles
        
        precapillary sphincter
        
        true capillaries
        
        form an interweaving called a capillary bed
        
        flow of blood from one side of the capillary bed to the other is called microcirculation
        
        10-100 per capillary bed
        
        Diffusion-respiratory gases, nutrients and waste move from highest to lowest concentration.
        
        4 paths across capillaries
        
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        Osmotic pressure (caused by non-diffusible solutes)
        
        in capillary osmotic pressure pulls fluid in, in interstitial fluid osmotic pressure fluid is pulled out of capillary
        
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        true capillaries
        
        surrounds the root of each true capillary
        
        valve to regulate flow of the capillaries
        
        sphincter relaxed-blood to true capillaries and exchange happens with tissue cells
        
        sphincter contracted-blood flows through metarteriole throughfare to venules, no exchange with tissue cells
        
        Metarteriole throughfare
        
        Post capillary venule
        
        Small veins
        
        Large veins
        
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        drains capillary bed
        
        joins a capillary to a venule
        
        bypasses exchange with tissue cells
        
        feeds capillary bed