Levels of O rganization of L iving T hings. Big things are often made up of smaller parts. Different kinds of l i t t l e p e i c e s or units make up different parts of a whole. Living things. are made up of cells. light microscope. scanning electron microscope.
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Different kinds of littlepeices or units make up different parts of a whole
are made up of cells
scanning electron microscope
carbon dioxyde (CO2) into their surrounding and
Cells take oxygen (O2) from their surrounding
Cells also take glucose (C6H12O6) from their surrounding
This process is called Respiration
living organisms give off waste products through a process called excretion.
Because each and every cell in an organism depends on respiration and excretion,
That organism must have some sort of circulationsystem in place to bring each cell what it needs, and carry away its waste products
When an organism is at rest, it needs less energy.Therefore its metabolism,(respiration andexcretion) and circulation are slow.
Therefore its metabolism,(respiration andexcretion) and circulation are fast.
Cells Tissues Organs Systems
(basic unit of life)
(parts of the cell)
In a dividing cell