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Friday, 19 October 2018

Cells The building blocks of life


Cells The building blocks of life 

Cells
are very small. They are the basic building blocks of all animals and plants. although all animals and plants made of cells their cells are quite different


Cells are made up of different parts called organelles meaning small organs it is easier to see the major organelles using simplified diagrams.
 

Large Vacuole 
Plants cells are much larger than animal cells
 The Large Vacuole is  when a plant dies there will be a Large Vacuole and can take up more than half of the volume of the cell


Cell wall 
a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants

Cell membrane 
The semipermeable membrane surrounding the cytoplasm of a cell 

Chloroplast 
Type of organelle known as a plastid  characterized by its two membranes and a high concentration 

Nucleus 
To control gene expression and mediate the replication of DNA 


What do these mean 

semipermeable
 A material  or membrane and letting certain things go past it  


cytoplasm 
A material or protoplasm  within a living thing 

 polysaccharides
 A carbohydrate example starch, cellulose  whose molecules consist of a number of sugars 

Nucleus The control center of the cell









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