Tissue Fluid

Question 1

what is Tissue fluid?

Answer 1

• The liquid that surrounds the cells in a capillary bed
• It is the medium through which oxygen and carbon dioxide are exchanged between the blood and respiring cells

Question 2

where is Tissue fluid formed?

Answer 2

It is formed at the arterial end of the capillary beds and reabsorbed at the venous end

Question 3

How is hydro static pressure created?

Answer 3

• Is the pressure exerted by the blood pushing against the vessel wall.
• Created by the contraction of the muscular walls of the ventricles during ventricular systole.
• Measured in millimetres of mercury

Question 4

How is oncotic pressure created?

Answer 4

• Blood Contains large amounts of dissolved proteins called plasma proteins
• Main type of abulmins
• function is to create oncotic pressure
• Oncotic pressure is the pressure of proteins pulling water towards them

Question 5

How is Tissue Fluid is formed?

Answer 5

• Hydrostatic pressure is higher in the blood than in the tissue fluid
• water and small molecules are forced out e..g oxygen, sodium, glucose
• large molecules stay inside the capillary e.g. proteins
• pressure drops as you move along the capillary bed because water moves out.

Question 6

How is Tissue Fluid is returned?

Answer 6

• Water potential in the blood becomes lower than the water potential in the Tissue Fluid
• Becuase the proteins remain in the blood
• Water moves into the capillary by osmosis
• Hydrostatic Pressure drops in capillary
• water moves in down pressure gradient
• Tissue Fluid drains into the lymph