How do paramecium eat?
Parameciums are very unique. They are little organisms that do not have brains, eyes, ears or a heart but can sense gravity, light and temperature. THEY EAT BY EATING THROUGH A HOLE IN ONE SIDE OF THEIR BODY, DIGEST IT, AND EXCRETE IT THROUGH THE OTHER SIDE. The side that they excrete it through, is called the anal pore.
Paramecium are a single celled organism. On the side of a Paramecium is a large vacuole that looks a lot like a mouth. Swallowing water through the vacuole, the paramecium picks up small morsels of algae which pass straight into its cellular structure, as its cell wall is permeable to small solids. If you look at a Paramecium under a light microscope you will see tiny dots within it, this is the food that it…
Since paramecium live in freshwater environments, freshwater is hypotonic towards paramecium, so it would '''expand''' (surrounding water goes into the paramecium). However, note that paramecium has a pair of contractile vacuoles that performs osmoregulation, which expels water out of the paramecium.