Capillary System

• what are blood circulatory systems


  systemic

  pulmonary

  specialised circulatory system
• what is specialised circulatory system


  portal

  coronary

  foetal
• what is transported in circulatory system

  O2 (RBCs)

  Nutrients

  CO2

  Metabolic waste

  Cells of Immune System (WBCs)
• systemic circulation

  - high pressue system (arterial side)

  - takes oxygen rich blood from the left side of the heart to the body tissues

  - returns oxygen poor blood from the tissues to the right side of the heart.

  
• pulmonary circulation


  low pressure system

  takes blood low in oxygen from the right side of the heart to the lungs

  takes blood rich in oxygen from the lungs to the left side of the heart.

  
• what is lymphatic system


  consists of:

  network of lymph vessels

  lymph

  lymphatic tissues and organs
• the function of lymphatic system


  involved in the body's defence mechanisms

  provides a mechanism for the drainage of interstitial fluid.
• interstitial fluid


  fluid moves from the arterial end of the capillary into the intersitial space

  fluid moves from the interstitial space back into the capillary at the venuous end
• capillary blood pressure CPB


  pushes the fluid out of the capillary into the interstitial fluid (taking nutrients, gases etc) filtration.

  
  

  decreases with progression along capillary

  
  

  greater than BCOP at the arterial end.
• Blood colloid osmotic pressure


  pulls fluid back into capillary (bringing wastes, gases etc) reabsorption.

  mainly due to plasma proteins.

  
  

  - remains constant

  
  

  greater than CBP at the venous end.
• how much fluid is reabsorbed and the the consequence of the remaining not being absorbed?


  almost 85 percent.

  
  

  remaining must be removed from the interstitial space otherwise oedema will result.
• the removal of excess interstitial fluid


  lymph capillaries are blind ended tubes that are located adjacent to capillary beds.

  
  

  the excess interstitial fluid enters the lymphatic capillary and is called lymph.

  
  

  lymph passes through the lymphatic circulation and returns to the blood system.
• lymphatic drainage


  from lymph capillaries leading to lymph vessels to bigger vessels. lymph trunks.

  
  

  along the lymph vessels lymph nodes filter the lymph.

  
  

  lymph trunks lead to either thoracic duct or lymphatic duct
• what is right lymphatic duct do:


  drains lymph from the right side of the head & neck & thorax and right upper limb.

  
  

  to right subclavian vein

  
• what does thoracic duct do


  drains lymph from the rest of the body to left subclavian vein.

  
• the fluid names throughout the journey?

  - plasma when in capillaries.

  - interstitial fluid when in interstitial space.

  - lymph when in lymph capillaries.
• name it

  A) A

  
• arteries in human body

  label them.

  A) common carotid

  B) aortic arch

  C) brachial

  D) aorta

  E) ulnar

  F) femoral

  G) popliteal

  H) posterior tibial

  I) dorsalis pedis

  J) radial

  
• veins of the human body

  label...

  A) superior vena cava

  B) inferior vena cava

  C) internal jugular

  D) branchiocephalic