Answer: bacteria
Explanation:
Prokaryotes are living organisms with one cell (unicellular) with no nuclear envelope, and cell organelles lacking membranes. Examples of Prokaryotes include bacteria and cyanobacteria
I believe that would be an open system.
Its found in the tectum of the dorsal aspect of the midbrain
It is proven to help build healthy muscles, joints, bones etc. It also has a good effect on your academic performance, as it increases the oxygen flow to the brain.
