noun. 1 The red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body: drops of blood.More example sentences. Synonyms. 1  Pressure is needed to pump the life giving, oxygen carrying blood around your body. The red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body: drops of blood. More example sentences. Synonyms. 1  Pressure is needed to pump the life giving, oxygen carrying blood around your body.
multi-cellular: an organism with 2 or more Cells (multi = many). A multicellular organism is an organism made up of more than one Cell, such as you, me, dogs, cats, birds, bugs, etc. They are complex. They are much much bigger than unicellular organisms and have more body functions. A unicellular organism (also called single cell organism) is an organism made up of only one Cell. Algae, some types of fungus, and bacteria are some examples. These organisms are not very complex, and all their body functions are carried out in that single tiny Cell.
Unicellular organisms are of two types Unicellular prokaryotic organisms and unicellular eukaryotic organisms. Unicellular prokaryotic organisms-they are unicellular in nature and they do not have membrane bound nucleus and membrane bound cellular organelles.These organisms are usually bacteria and cyanobacteria. Example: E.coli, Salmonella, Nostoc, etc.nicellular organisms are of two types Unicellular prokaryotic organisms and unicellular eukaryotic organisms. Unicellular prokaryotic organisms-they are unicellular in nature and they do not have membrane bound nucleus and membrane bound cellular organelles.