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Glossary of Chapter 18 middle school life science

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Tissue
similar cells that have a similar function
Organ
Group of tissues that carry out a specific function
System
Group of organs that work together
Organism
Formed when systems work together
Level of organization
1) cell
2)tissue
3) organ
4)system
5) organism
Cell theory
1) all organisms are made of one or more cells
2) all new cells come from other cells
Cell Membrane
Holds a cell together. Controls waht enters and leaves the cell.
Largest structure inside a cell
Nucleus
Cytoplasm
Gel that contains all the molecules and tiny structures found within a cell.
Organelles
They do work of the cell.
Cell wall
gives plant cell its shape and provides support for the entire plant.
Cell Division
Process where cell splits in two, making the structure larger
DNA what it stands for
deoxyribonucleic acid
Ammount of chromosomes in humans
46
Sex Chromosomes (Boys)
XY
Sex Chromosomes (girls)
XX

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