Composition and Formation of lymph ::
Lymph consists of large number of leucocytes mainly lymphocytes ranging from 1000 to 20000 per cmm platelets and red blood corpuscles are absent in lymph the noncellular part consists of 94% water and 6% solids in a soluble form the composition of solids varies from time to time and according to the site the main solids are proteins (2.0-4.5%) fats (5.0 to 15%) carbohydrates (130 mg%) urea (23.5 mg%) nonprotein nitrogenous substance (34.8 mg%) creatinine (1.4 mg%) and other inorganic substances
Lymph is formed by passage of substances from capillaries into the tissue spaces by the process of transudation the transudation includes filtration and diffusion since lymph is formed from the tissue fluid anything that increases the amount of tissue fluid will pari pasu increase the lymph formation substances that increase the lymph formation and its flow are called lymphagogues
Factors affecting lymph formation ::
1.Capillary pressure 2. permeability of capillary walls 3. substances directly affecting the capillary wall 4.substances affecting the osmotic pressure of the interstitial fluid and peritubular fluid 5. anoxia 6. metabolites 7. passive movements and massage
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