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LO: SWBAT explain how the
body is organized
DN: What are cells? Explain the
difference between a unicellular
and a multicellular organism.
HW: h/o cells r us
Tuesday October 2, 2012
How is the body
organized?
The body is highly
organized. It allows the
body to function as a finetuned machine! It always
starts from a smaller
structure, combining to
create a larger structure.
1. Organelle
Substructure of a cell
It performs a specific
function
Found inside the cell
2. Cell
Microscopic
Made up of organelles
All living things are made
up of cells
3. Tissue
A group of cells working
together form a tissue.
Ex: Muscle cells working
together form muscle tissue, skin
cells working together form skin
tissue.
4. Organ
 One or more tissues
working together to perform
a specific function.
Ex. stomach, skin, liver
kidney
lungs
5. Organ System
Two or more organs that work
together to perform a specific
process.
Ex. Stomach, small intestine,
large intestine all work together to
form the digestive system.
Digestive system
6. Organism
When all organ systems work
together and create a living
thing
Ex. fungi, plants, animals
organelles
cells
tissues
organism
Organ
systems
organs
There are many different types
of cells! They have a variety of
sizes and shapes! Why is this?
Each type of cell carries out a
different function
Ex. Muscle cells, nerve cells,
sperm cells