Blood capillary overview fig 23 13 p 477
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Blood & Capillary Overview (Fig 23.13; p. 477). http://facstaff.gpc.edu/~jaliff/anablves.htm. http://focus.aps.org/story/v20/st21. Blood. Human Circ. System has 4-6 L. Cellular Elements represent 45% of total blood volume. RBCs & WBCs Plasma (Straw colored liquid)

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Blood & Capillary Overview (Fig 23.13; p. 477)

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Blood capillary overview fig 23 13 p 477

Blood & Capillary Overview(Fig 23.13; p. 477)

http://facstaff.gpc.edu/~jaliff/anablves.htm

http://focus.aps.org/story/v20/st21


Blood

Blood

  • Human Circ. System has 4-6 L.

  • Cellular Elements represent 45% of total blood volume.

    • RBCs & WBCs

    • Plasma (Straw colored liquid)

    • Platelets (part of bone marrow cytoplasm)


Plasma

Plasma

  • Makes up over 1/2 of blood volume.

  • 90% is H2O

  • 10% is inorganic salts (ions, proteins, etc)

    • Ions = osmotic balance / pH balance

    • Proteins =

      • Blood clotting (fibrinogen)

      • Immunity (immunoglobulins)


Capillaries

Capillaries

  • Thin enough for Transport of Substances between Blood and Interstitial Fluid.

  • Composed of epithelial cells.


Transport of substances fig 23 12b p 476

Transport of Substances(Fig. 23.12B; p. 476)

  • O2 & CO2 = Diffusion

  • Lgr. Molecules = Vesicles/Endocytosis /Exocytosis

  • H2O & Solutes = “Leaky clefts”

  • Proteins = Too Big to pass through


Forces transport of substances

Forces Transport of Substances

  • Blood Pressure - active force pushing fluid outward.

  • Osmotic Pressure - active force pulling fluid inward

    (*  [solute] in blood ).


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