Key words-
cells: the smallest unit from which all organisms are made
organelle: subcellular structure that has one or more speci c jobs to perform in the cell
all organisms are made of cells, new cells are made by the division of the existing cells.
, microscopes-
light microscope:
• shines light through the piece you are looking at , and uses
glass lenses to magnify and focus the image
• can magnify about 1500 times
• a photo taken using a light microscope is called a
photomicrograph
Electron microscope:
• can magnify up to 500000 times
• uses a beam of electrons to magnify
• pictures taken by it are called electron micrographs
Parts of a cell-
Cell membrane:
• on the outside of every cell
• is a very thin layer of protein and fat
• controls what goes in and out of the cell
• semi-permeable
• separates the contents of the cell from it’s environment
cells: the smallest unit from which all organisms are made
organelle: subcellular structure that has one or more speci c jobs to perform in the cell
all organisms are made of cells, new cells are made by the division of the existing cells.
, microscopes-
light microscope:
• shines light through the piece you are looking at , and uses
glass lenses to magnify and focus the image
• can magnify about 1500 times
• a photo taken using a light microscope is called a
photomicrograph
Electron microscope:
• can magnify up to 500000 times
• uses a beam of electrons to magnify
• pictures taken by it are called electron micrographs
Parts of a cell-
Cell membrane:
• on the outside of every cell
• is a very thin layer of protein and fat
• controls what goes in and out of the cell
• semi-permeable
• separates the contents of the cell from it’s environment
