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Our bodies have some 50 trillion cells

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Cells that have a nucleus are eukaryotes.

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An normal animal cell measures around 10 mircrons.

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between 70 to 80 percent of a cells weight are from water

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The phloem and xylem cells of the vascular tissue are located inside the middle ring.

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frog sperm has a head but no eyes

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All the cells in a complex organism whether they are brain,heart,or liver start out as a group of generalized cells in young embryo.

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Some cells work alone or some work as a unit with other cells by coming together to form tissues and organs.

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All plants have the same cell structure

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Plant cells , like Animals cells can group together to make tissues

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A Myoblast is a type of Embryo that will grow and develop into a Muscle cell

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Robert Hooke was the first scientest to use the word "cell" to mean the basic unit of life

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Cell walls are made in part from a loosely woven fabric called cellulose

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The body's organs are made up of tissues, which are sheets of cells that are joined together.

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"Cells with different functions often have different have different shapes that match their jobs"

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animal cells do not have cell walls, chloroplasts, and no starch grains but plant cells has all all those.

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It would take 30,000 of the worlds smallest cell to cover 0.04 in. That is 1mm.

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I takes 20000 cells to cover a pin head

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all cells have a thin outer membrane

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Amoeba is one of the most common simple life forms

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They can join together communicate, move grow and reproduce.

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Some single-celled organisms called bacteria are so tiny that five side-by-side measure only 1/10,000 of an inch. ( 0.00025 centimeters)