Cell Theory

Front 1

Cell theory states that

Back 1

All living organisms are created from cells. they are a basic unit of life ( mulitcellular , organs) (unicellular, bacteria)
- smallest unit of life
- come from preexsisting cells

Front 2

Discuss the evidence of cell thoery

Back 2

scientists looked at living organisms.They discovered that all living organisms where made up of these small units which they proceeded to call cells.

Front 3

Importance of the surface area to volume ratio as a factor limiting cell size.

Back 3

The surface area of the cell is vital for this. Surface area affects the rate at which particles can enter and exit the cell

Front 4

Multicellular organisms show emergent properties.

Back 4

For example: cells form tissues, tissues form organs, organs form organ systems and organ systems form multicellular organisms. The idea is that the whole is greater than the composition of its parts. For example your lungs are made of many cells.

Front 5

cells in multicellular organisms

Back 5

Multi cellular carry out specialized functions by expressing some of their genes but not others.The reason we have different types of cells in our body (the cells in your eyes are not the same as the ones that make up your hair) is because different genes are activated in different cells. For example, the gene that produces keratin will be active in hair and nail cells. Keratin is the protein which makes up hair and nails. Genes encode for proteins and the proteins affect the cell’s structure and function so that the cell can specialize.

Front 6

stem cells

Back 6

Retain the capacity to divide and can differentiate in different pathwaystem cells have the ability to produce a wide range of cells which means that they are pluripotent. They retain their ability to divide and produce many different cells by cell division and the process of differentiation.