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Plant cells

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Animal cells enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles.

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Tissue cells secrete an extra cellular matrix. Extra cellular matrix is a mix of proteins and polysaccharides that bind The cells together and gives  the tissue mechanical strength.

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Cells that form side by side form interconnected epithelial sheets that line internal organs and cover our external surfaces. Epithelial sheets form selective barriers that preform many of the same task as an individual plasma membrane: provide protection, taking up nutrients, exporting wastes and interactions with the environments.

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Eukaryotes include all living organisms other than the eubacteria and archaebacteria.

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These cells together form tissues

Tissues - A collection of cells that carry out a specific function and interact with neighboring cells.

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Most cells are part of a larger community

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a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles.

Prokaryotes include the bacteria and cyanobacteria.

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organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus.

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Examples of Prokaryotic cells are bacteria and archaea.

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Confocal microscope

This is a light microscope that uses a laser beam to scan the specimen in slices. This way it can form a three dimensional image.

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A microscope is an instrument that magnifies images using light or electron beams.

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Cell diversity is the differences in sizes of a cell. The cells in your organs aren’t going to be the same size as the other cells.

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Scanning electron microscope

This microscope uses electron beams that scatter of the surface of the cells, allowing the examination of the cells and other structures, but only the surface

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All Cells......

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Transmission electron microscope

This microscope passes electrons through thin sections of cells or tissue that have been stained for contrast.

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Light Microscope

This is a microscope that uses visible light to illuminate specimens. This microscope can magnify up to 1,000 times.

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Plasma membrane is a barrier that separates the inside of a cell from the outside, and controls what enters and exits the cell. It consists of two layers of lipids embedded with proteins. This is also known as a cell membrane. Ribosomes are tiny particles of protein and RNA that translate the information in RNA molecules and uses it to direct the assembly of proteins.

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Electron microscope

An electron microscope is a type of instrument that uses beams of electrons to illuminate specimens. This can magnify up to a million times. They come in two varies.

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Plant cells have a plasma membrane, ribosomes, an endomembrane system, mitochondria, and a nucleus, like animal cells.

However plant cells have things animal cells don’t: a cell wall made of cellulose, vacuoles, and chloroplasts.

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Animal cells

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Eukaryotic Cells

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Prokaryotic Cells

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Viewing cells with a microscope

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All cells have ribosomes and a plasma membrane.

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Outside the living cell

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Cell diversity and size

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Cells are the fundamental unit of life

All living things are made up of cells

All cells come from preexisting cells.

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The Cell Theory

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Matthias Jakob Schleiden was a German botanist. Theodor Schwann was a German physiologist. Schleiden studied plants and Schwann studied animals.

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Schleiden, Schwann and many other scientists at this time, confirmed that cells are the fundamental unit of life. They also confirmed that all living things are made up of cells.

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Robert Hooke was the first person to ever see a cell. Hooke designed a microscope to magnify all sorts of materials. He drew what he observed.       Robert put all of his drawings into a book called Micrographia.

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Important scientists who have contributed to knowledge of cells