Tissue Fluid

Question 1

What is tissue fluid?

Answer 1

Fluid containing water, glucose, amino acids, fatty acids and oxygen which bathes the tissue

Question 2

How is it formed?

Answer 2

Blood enters the capillaries from arterioles, small diameter results in high hydrostatic pressure so all compounds within are forced out.

This is also known as ultrafiltration

Question 3

What is forced out in ultrafiltration? Why?

Answer 3

Small enough
Oxygen
amino acids
fatty acids
glucose
water
dissolved minerals

Question 4

What isn’t forced out in ultrafiltration? Why?

Answer 4

Too big
Red blood cells
Platelets
Large proteins

Question 5

How is tissue absorbed again?

Answer 5

Large molecules remain in the capillaries and create a lower water potential gradient.

Towards the venule end of capillaries, hydrostatic pressure is lowered due to loss of liquid but gradient remains low.

Water remains by osmosis