Tissue Fluid Formation - Confused!!

Ok, my notes for how tissue fluid is formed and returned to the circulatory system seem a bit sketchy and well... I don't have a clue!

"The What" ; Tissue fluid is formed due to the hydrostatic pressure from the pumping of the heart. It is composed of water molecules, fatty molecules, CO2 and lymph (drained of in the lymph system afterwards).

"The Where" ; In capillaries; specially adapted one-cell thick tubes which occur after the arteries.

"The how" ; pressure causes, small molecules to be pushed out of the blood plasma through the capillaries (ultrafiltration) and to form interstitial fluid (tissue fluid) Note plasma proteins from the blood remain in the blood plasma since these are too large to pass through capillaries. Water is reabsorbed into the blood plasma by osmosis to maintain blood pressure.

Good Luck for your exam!

Thanks so much!!

I was dreading it but I did a past paper for each unit last night and got 60 and 62 out of 75... which I know isn't great. But now I can address those last few issues!

Are you taking it too?

those scores exceed the grade boundaries for A
you have nothing to worry about