Lymphatic System

here’s Biology Form 5 chapter 1 Transport🙂  anything problem you could comment me🙂

FORMATION OF THE INTERSTITIAL FLUID

  • When blood flows from the arteries into the capillaries, there is higher hydrostatic pressure at the arterial end of the capillaries.
  • Some fluid forces out due to the high pressure through capillaries wall into the intercellular spaces.
  • When the fluid out, the fluid called interstitial fluid or tissue fluid.
  • This fluid is similar to blood plasma but it does not have erythrocytes , platelets and large protein molecules.
IMPORTANCE OF THE INTERSTITIAL FLUID
  • It bathes the cells
  • Supply the cells requirements
  • Oxygen & nutrients diffuse from blood through the interstitial fluid and cells
  • Excretory products such as carbon dioxide and urea diffuse out
  • The internal environment is kept within the range by homeostatic processes.
FATE OF THE INTERSTITIAL FLUID
  • 90% of the fluid flows back to the venous where the hydrostatic pressure is low.
  • 10% enters the lymphatic capillaries and called lymph
  • If the excess fluid unable to return back to the blood capillaries, it will cause tissue swelling and this condition called oedema.
STRUCTURE OF THE LYMPHATIC SYSTEM
  • Lymph is the colourless fluid in the lymphatic vessel.
  • it contain a higher number of lymphocytes than blood.
  • it also travel through the lymphatic vessels by the contraction of the surrounding skeletal muscle.
  • Flows in one direction, one end of the vessel is closed and back flow is prevented by valves present in the larger vessel.
  • the center for lymphatic system named thoracic duct ; the largest lymphatic vessel in the body
  • it carries lymph to the left subclavian  vein back to the bloodstream
  • the right lymphatic duct transport lymph from the right side of the head and chest into the right subclavian vein.
  • Lymph node mainly found at the neck, armpits and groin.
ROLE OF THE LYMPHATIC SYSTEM
  • Collect interstitial fluid and returns it to the circulatory system.
  • Lacteal; lymphatic capillaries in the villi of the ileum absorbs fats and fat-soluble vitamins hence transport them to the blood circulatory system
  • Lymph nodes filter out bacteria & other foreign particles
  • Lymphocytes produce antibodies which aid in the destruction of pathogens and neutralization of toxin
lymphatic system

 formation of interstitial fluid and lymph

One thought on “Lymphatic System

  1. […] of lymph nodes and the lymphatic system in the bodyHow to keep your lymphatic system healthlyLymphatic Systemfunction getTubePressBaseUrl(){return […]

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