Chapter 1


Published on

Published in: Education
1 Like
  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Chapter 1

  1. 1. Chapter 1TRANSPORT The Lymphatic system
  2. 2. Subtitle that we study last lesson How blood pressure is regulated The circulatory system in human , fish and amphibians The necessity for blood clotting Blood clotting Problem related to blood clotting
  3. 3. The lymphatic systemFormation and composition of interstitial fluid The pressure is enough to cause fluid to leak from the blood into the space between the cells. The fluid is known as interstitial fluid. Important for the exchange of materials between blood and cell Question…… What consists in the Interstitial fluid?
  4. 4.  Interstitial fluid consists of water, dissolved nutrients, hormones,waste product from blood. Does not contain R.B.C and platelets--- -too large to pass through capillaries ,but contain W.B.C can immersed through the openings between capillary cells.
  5. 5.  About 85%of the fluid that leaves the blood at arterial end of the capillary re- enter at the venous end. The interstitial fluid must returned to the circulatory system to maintain the normal blood volume. About 15% of the fluid that still remains in the interstitial space.(4 litre fluid lost each day) The fluid loss is returned to the blood through the lymphatic system.
  6. 6. Area of highblood pressure Area of lower blood pressure
  7. 7. The Lymphatic System Lymphatic system is a one –way system consisting lymph capillaries, larger lymphatic vessels and lymph nodes. Lymph capillaries are blind-ended tubes that locates in the spaces between the cells. The interstitial fluid that has not been reabsorbed into the bloodstream goes into the lymph capillaries. Once inside the lymph capillaries ,the fluid is known as lymph.
  8. 8.  Lymph capillaries converge into larger lymphatic vessels . Lymphatic vessels contain valves to prevent the backflow of the lymph. Lymph nodes located along that lymphatic vessels . They produce and store lymphocytes to protect the body against infection. Lymphatic vessels drains into one of the two main channels that are thoracic duct and right lymphatic duct. Question … Where the thoracic duct and right lymphatic duct receive lymph?
  9. 9.  The thoracic duct receive lymph from the left side of the head ,neck and chest. The right lymphatic duct from the right arm, shoulder area, and the right side of the head and neck. Thoracic duct empties its lymph into the left subclavian vein while the right lymphatic duct empties into the right subclavian vein. The lymph moves to the subclavian veins with the help of (a)one–way valves (b)contraction of the surrounding skeletal muscles (c) intestinal movement (d)Change in the pressure occur during inhalation and exhalation
  10. 10. The role of the lymphatic systemin transport Lymphatic system helps maintain the fluid balance in the body. If the excess fluid is not returned to the bloodstream ,the body tissues become swollen because too much of fluid. Excessive accumulation of interstitial fluid in the spaces between the cells is known as oedema. Oedema may cause by a blocked lymphatic vessels. Water and nutrient diffuse from blood capillaries into the surrounding body tissues. Lymph capillaries that transport droplets of lipids and fat-soluble vitamins to the bloodstream are called lacteals(in the villi of the small intestine).