Tissue fluid

• How is it formed

  Blood enters capillaries from atrioles

  Smaller diameter results in higher pressure

  Water amino acid oxygen etc are forced out

  Ultrafiltration
• How its reabsorbed

  Venule end of capillary hydrostatic pressure lowered due to loss of fluid

  But water potential is very low

  Water re enters by osmosis carry with it the waste from ultrafiltration