tissue fluid

Question 1

what is tissue fluid?

Answer 1

• a watery substance containing glucose, amino acids, oxygen, and other nutrients
• it supplies these to the cells, while also removing any waste materials

Question 2

what types of pressure influence formation of tissue fluid?

Answer 2

• hydrostatic pressure = higher at arterial end of capillary than venous end
• oncotic pressure = changing water potential of the capillaries as water moves out, induced by proteins in the plasma

Question 3

how is tissue fluid formed?

Answer 3

as blood is pumped through increasingly small vessels, hydrostatic pressure is greater than oncotic pressure, so fluid moves out of the capillaries, it then exchanges substances with the cells

Question 4

how does tissue fluid differ from blood and lymph?

Answer 4

• tissue fluid is formed from blood, but does not contain red blood cells, platelets, and various other solutes usually present in blood
• after tissue fluid has bathed cells it becomes lymph, and therefore contains less oxygen and nutrients and more waste products