Mechanism of Venous Blood Flow

• Skeletal Muscle Pump?

  figure 18.2

  A) valve & muscle opens

  B) relaxed muscle & closed

  
• Distribution of Blood flow- SYSTEMIC CIRCULATION 84%

  vessel category

  certain vessel type & percentage of blood flow?

  1. systemic arteries 13%
  2. aorta 2%
  3. elastic arteries
  4. muscular arteries 5%
• Distribution of Blood flow

  SYSTEMIC CIRCULATION

  vessel category

  certain vessel type & percentage of blood flow?

  1. systemic capillaries
  2. 7%
• SYSTEMIC CIRCULATION

  vessel category

  certain vessel type & percentage of blood flow?

  1. systemic circulation 84%
  2. systemic veins 64%
  3. Large Veins 18% & Large venous network (liver, bone marrow, integument) 21%, & venules and medium-sized veins 25%
• Distribution of Blood flow- PULMONARY CIRCULATION

  certain vessel type & percentage of blood flow?

  1. pulmonary arteries 3%, pulmonary capillaries 2%, & pulmonary veins 4%
• Heart

  percentage of blood flow?

  7%
• Systemic circulation

  The part of the cardiovascular system that delivers oxygenated blood to the body's tissues and organs, and returns deoxygenated blood back to the heart. Accounts for 84% of the body's total blood flow.
• Systemic veins

  The veins that carry deoxygenated blood from the body's tissues and organs back to the heart. Account for 64% of the body's total blood flow.
• Large veins


  A subset of systemic veins that include the largest veins in the body, such as the vena cava. Account for 18% of the body's total blood flow.
• Large venous network (liver, bone marrow, integument)


  The network of large veins that supply specific organs, such as the liver, bone marrow, and skin. Account for 21% of the body's total blood flow.
• Venules and medium-sized veins

  Smaller veins that collect blood from the capillaries and transport it to the larger veins. Account for 25% of the body's total blood flow.