Tissue

• What is tissue fluid formed from?

  blood
• what is tissue fluid?

  the fluid that surrounds cells in tissues
• What is tissue fluid made from?

  Small molecules that leave the blood plasma (eg oxygen, nutrients, water)
• Unlike blood, what does tissue fluid NOT contain?

  red blood cells

  big proteins

  Because they are too large to be pushed out through the capillary walls
• What do cells take in?

  oxygen and nutrients from the tissue fluid, and release metabolic waste into it
• What happens in the capillary bed?


  Substances move out of the capillaries, into the tissue fluid, by PRESSURE FILTRATION
• What happens to any excess tissue fluid?

  It is drained into the lymphatic system, which transports this excess fluid from the tissues and dumps it back into the circulatory system
• Describe the lymphatic system?

  A network of tubes that acts a bit like a drain
• what does high blood pressure mean?

  A high hydrostatic pressure in the capillaries, which can lead to an accumulation of tissue fluid in the tissues