tissue fluid

• What is tissue fluid?


  Liquid surrounding the cells in the body
• What does tissue fluid contain?

  Water, glucose, amino acids, fatty acids
• How does tissue fluid help cells?

  It allows diffusion of essential molecules
• How is tissue fluid formed?

  From capillaries that are one cell thick
• What causes the formation of tissue fluid?

  High hydrostatic pressure in capillaries
• What role do capillaries play in tissue fluid formation?

  They allow small molecules to be forced out
• What molecules are forced out of capillaries?

  Water, glucose, and small proteins
• Why is tissue fluid not red in color?

  It lacks red blood cells
• Why must tissue fluid be reabsorbed?

  To prevent swelling and maintain blood volume
• Where does reabsorption of tissue fluid occur?

  At the venule end of capillaries
• What causes water to move back into capillaries?

  Osmosis due to negative water potential
• What happens to the hydrostatic pressure in capillaries during reabsorption?

  It drops very low
• What waste molecules are reabsorbed with water?

  Carbon dioxide and urea
• What happens when equilibrium is reached in tissue fluid reabsorption?

  Some fluid must be absorbed by lymphatic system
• What is lymph?

  Fluid absorbed by the lymphatic system
• How do lymph vessels compare to veins?

  They have valves and surround blood vessels
• Where does lymph eventually return to the blood?

  Near the heart
• What is the process of tissue fluid formation and reabsorption?

  • Tissue fluid surrounds body cells
  • Formed by ultra filtration in capillaries
  • High hydrostatic pressure forces out small molecules
  • Reabsorbed at venule end by osmosis
  • Lymphatic system absorbs excess fluid
• What are the key components of tissue fluid and their significance?

  • Contains: water, glucose, amino acids, fatty acids
  • Provides essential molecules for cell survival
  • Removes waste products like carbon dioxide and urea
• What are the differences between the arteriole and venule ends of capillaries in terms of pressure and fluid movement?

  • Arteriole end: High hydrostatic pressure, fluid forced out
  • Venule end: Low hydrostatic pressure, fluid reabsorbed