Science glossary film: Multicellular

Made up of more than one cell. Multicellular organisms have different cells for different purposes, such as blood cells and nerve cells in animals, and leaf cells and root hair cells in plants. The number of cells varies from one multicellular organism to another. The human body contains trillions of cells, whereas some microorganisms, like these tiny roundworms living in the sand, have fewer than a thousand cells.

Multicellular organisms have different cells for different purposes, such as blood cells and nerve cells in animals, and leaf cells and root hair cells in plants. The number of cells varies from one multicellular organism to another. The human body contains trillions of cells, whereas some microorganisms, like these tiny roundworms living in the sand, have fewer than a thousand cells.