Cell structure

Cells

žAll living things are made of cells.žOrganisms that are single cells are called unicellular.Bacteria.
žMicroscopes

They are used to study cells.žLight microscopes shine light through animal or plant cells to make them visible.—Can magnify up to 1500 times.
—Only able to see some cell structures.ž
Scientist use a electron microscope to cells in great detail.—It uses electrons as a way to see cells and there parts.—Magnifies 500,000 times.
Cell Membrane

žAll cells have a cell membrane—It is a layer that surrounds the cellžInside the membrane is a substance called the cytoplasm, which surrounds the organelles.žOrganelles are a small structure in the cell.

Cell Wall

žPlant cells have a cell wall.žIt is made of cellulose fibers that crisscross each other.žThe spaces between the fibers makes the cell wall fully permeable, allows water and air through the layer.
Partially permeable membranes

žCell surface membrane or plasma membrane surrounds the cell.žIt is made up of proteins and fat.žIt has the important task of controlling what goes into and out of the cellThis is called partially permeable.
Cytoplasm

žIs made up of 70% water and other dissolved substances

žThis is where many metabolic reactions occur.

Vacuoles

žMost cells contain vacuoles or space in the cell surround by a membrane.žThey store substances for the cell—In plant cells it contains cell sap or a solution of sugar water—In animals it contains food and water .

Chloroplasts

žAn organelle that collects sunlight and makes energy from it.žFound in mostly in plantsžInside chloroplasts are chlorophyll that gives it a green pigment and is what absorbs the sunlight.—Chlorophyll contain starch grains—This is where photosynthesis occurs
Nucleus

ž  It stores the genetic information for the cell.

ž This information controls which proteins are made.

ž The genetic information is held on chromosomes that are made up of DNA.