Cells

Front

Cell Noun

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[sel]

Back

Cell

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The basic, smallest structural and functional unit of all living organisms, often referred to as the building block of life.

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Example: The image shows a simple diagram of a cell with labeled parts, helping students learn about the basic structure of cells.

Front

Organism Noun

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[or-guh-niz-uhm]

Back

Organism

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An individual living being, such as an animal, plant, or single-celled life form, that is composed of one or more cells.

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Example: An amoeba is a single-celled organism that moves and feeds using its flexible body.

Front

Microscope Noun

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[my-kruh-skohp]

Back

Microscope

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A scientific instrument that uses lenses to magnify objects that are too small to be seen with the naked eye.

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Example: The image labels each part of a microscope, showing how it magnifies small objects.

Front

Animalcules Noun

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[an-uh-mal-kyoolz]

Back

Animalcules

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The historical term for microscopic organisms, like bacteria and protozoa, first observed by Antonie van Leeuwenhoek in the 17th century.

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Example: This image shows different types of microscopic organisms known as animalcules, first observed by Antonie van Leeuwenhoek.

Front

Unicellular Adjective

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[yoo-ni-sel-yuh-ler]

Back

Unicellular

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Describing an organism that is composed of only one single cell, which carries out all of its life processes.

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Example: An amoeba is a unicellular organism that performs all life processes within one cell.

Front

Multicellular Adjective

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[muhl-tee-sel-yuh-ler]

Back

Multicellular

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Describing an organism that is composed of many cells, which are often specialized to perform different functions within the organism.

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Example: The image shows skeletal muscle cells, demonstrating how many specialized cells work together in a multicellular organism.

Front

Prokaryote Noun

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[proh-kar-ee-oht]

Back

Prokaryote

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A microscopic single-celled organism that does not have a distinct nucleus with a membrane or other specialized membrane-bound organelles.

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Example: This diagram shows a prokaryotic cell, highlighting parts like the nucleoid and ribosomes, which lack a membrane-bound nucleus.

Front

Eukaryote Noun

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[yoo-kar-ee-oht]

Back

Eukaryote

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An organism consisting of a cell or cells in which the genetic material is enclosed within a distinct, membrane-bound nucleus.

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Example: The image shows an animal cell with a nucleus, illustrating what makes it a eukaryote.

Front

Bacteria Noun

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[bak-teer-ee-uh]

Back

Bacteria

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A large domain of prokaryotic microorganisms that are typically unicellular and lack a nucleus and other membrane-bound organelles.

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Example: The image shows a labeled diagram of a bacterium, highlighting its cell wall, plasma membrane, and nucleoid area, explaining its structure.

Front

Cell Membrane Noun

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[sel mem-breyn]

Back

Cell Membrane

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The semipermeable membrane surrounding the cytoplasm of a cell, controlling the passage of substances in and out of the cell.

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Example: The image shows the cell membrane's structure, highlighting its semipermeable nature with labeled parts like phospholipids and proteins.