Question: Arteries Veins Capillaries Structure ______ Layers Thick Muscle Layer With _______around It Round Lumen ______ Layers Thinner Muscle Layer Has Valves ______ Lumen Only Tunica Intima Layer Very Thin And _______ A Lot Into Anastomoses Have Precapillary Sphincters Function Carries Blood Away From Heart Carries O_______ And Nutrients Carries Blood ___heart …

Question: Arteries Veins Capillaries Structure ______ Layers Thick Muscle Layer With _______around It Round Lumen ______ Layers Thinner Muscle Layer Has Valves ______ Lumen Only Tunica Intima Layer Very Thin And _______ A Lot Into Anastomoses Have Precapillary Sphincters Function Carries Blood Away From Heart Carries O_______ And Nutrients Carries Blood ___heart …

Arteries

Veins

Capillaries

Structure

______ layers

Thick muscle layer with

      _______around it

Round lumen

______ layers

Thinner muscle layer Has valves

______ lumen

Only tunica intima layer

Very thin and _______ a

         lot intoanastomoses

Have precapillary

          sphincters

Function

Carries blood away from

       heart

Carries O_______ and

       nutrients

Carries blood ___heart

Deoxygenated

Carries ____ and other

      wastes

E________ vessels –

   delivers O2 & nutrients

   to cells, picks up CO2 &

   wastes from cells

Pressure

Highest in large arteries (120/80 mm)

Starts decreasing in

    _________

Very low pressure

   under 20 mm

Needs _____ pushing  

    blood back to heart

Still have ___ to ___ mm  

   pressure to allow for   

   e________ function

Velocity

_______est

Medium

Slowest due to _______ing

Other

Vasoconstriction and   

   vasodilation occur in

   ________to regulate  

blood flow and BP

Help moving blood comes from ________,

________, _________.

Three types based on

   size openings between

   ______ ing cells

Color

Usually shown in _____

Usually shown in ____

One end ___ one end ____