Biology tissue fluid

I’m doing SNAB biology for a level and recently learnt about tissue fluid, but I can’t find anything about it in the specification. Do I still need to learn about tissue fluid even though I can’t find any resources about it for SNAB apart from my teachers slideshow?

I did SNAB and I have no recollection of learning about tissue fluid, so I think you don't need to know about it. What context were you taught about it?

We learnt about how tissue fluid is formed by the hydrostatic pressure, water potential and plasma protein concentration of the capillaries, and also how it is returned to the circulatory system by the lymphatic system.

I don't think you'll need to know that - I think you will be ok. It may be useful depending on what your article is on during Year 13, but you won't see the article until March of Y13.