protozoan

a single-celled eukaryote that has some animal-like characteristics.

ciliates

a group of protozoans that moves by waving tiny, hair-like organisms called cilia

amoebas

a group of protozoans that move by means of psuedopods

flagellates

group of protozoans that use a whip-like organelle called a flagellum

sporozoans

a group of protozoans that do not have organelles for movement and are parasites

parasites

an organism that lives in or on a host organism and causes it harm.

bacteria

organisms that consist of a single, prokaryotic cell

photosynthetic bacteria

bacteria that produce their own food through protosynthesis

anaerobic bacteria

bacteria that do not require oxygen to survive

aerobic bacteria

bacteria that use oxygen for cellular respiration

virus

a tiny, non-living particle made up of genetic material and protein

host cell

a cell that is, or becomes, infected with a virus

immune system

a system that protects an organism from unfamiliar objects like viruses

antibodies

proteins that bind to viruses and prevent them from infecting cells.

vaccine

a preparation of virus particles that, when injected into the body, causes the immune system to produce antibodies