Final Considerations of the Laboratory Class

The freshwater protozoa is hypertonic in relation to the external environment. So, it receives constant inflow of water by osmosis and, in order not to “explode”, it has pulsatile vacuoles - responsible for the elimination of excess water.

In freshwater, we can find the following protozoa, algae and molluscs:

- Amebas: freshwater protozoan

- Euplotes: freshwater protozoan

- Didinium: freshwater protozoan

- Paramécio: freshwater protozoan

- Rotifers: freshwater protozoa

- Nematode: freshwater protozoan

- Euglenas: freshwater protozoan

- Algae Chestnuts

- Green algae

- Layered seaweed

- Cotton Algae

- Filamentous algae

- Horn-shaped seaweed

- Brush-shaped algae

- Algae in the shape of dots

- Bearded algae

- Snails: freshwater mollusc

- Slugs: freshwater mollusc

- Snails: freshwater mollusc

However, the salty water protozoa rarely has pulsatile vacuoles, since it is isotonic in relation to the external environment. Therefore, it does not present problems in its osmotic regulation.

In salty water, it is possible to find the following living beings:

- Plankton: marine organism

- Bentos: marine organism

- Neon: marine organism

- Phytoplankton: marine microorganism

- Diatoms: marine microorganism

- Cyanophytes: marine microorganism

- Phytobenthos: marine microorganism

- Macroalgae: marine microorganism

- Marine herbs: marine microorganism

- Microfitobentos: marine microorganism

- Zooplankton: marine protozoan

- Marine Invertebrates: marine protozoan

- Oysters: marine molusc

- Mussels: marine molusc

- Nudibranchs: marine molusc

- Seafood: marine molusc

- Teredo Navalis: marine molusc

- Lula: marine molusc

- Sépias: marine molusc

- Octopus: marine molusc