THE CELL

CELL

The basic unit of structure and function in living things.

cells perform processes that a living thing needs in order to stay alive. For example:

- obtaining oxygen - getting rid of waste - growing

cells are what living things are made of.

FUN FACTS ABOUT CELLS!

Cells come in different shapes and sizes Circular, “penne pasta”, amorphous (no shape) Cells are what living things are made of

Size of Cells: varies-largest cell

Ostrich egg

What do cells do?

Unicellular organisms- single cell performs all functions for that organism. Movement Eating Water absorption

Multicellular Organsims

Muscle cell They make up muscle tissue

Skin cellskin cells make up our skin tissue that makes our skin which is the largest organ in our body!

HOW DID WE DISCOVER THE CELL??

Robert Hooke: built his own compound microscope in order to observe a thin slice of cork (bark of cork tree).

He came up with the term "cell" to describe what he saw.

Cell means "small room”

Anton van Leeuwenhoek

observed lake water through a microscope.

called the unicellular organisms he saw"animalcules".

Scientists, their discoveries, and the creation of the Cell Theory Schleiden: in 1838, concluded that

all plants are made of cells Schwann: in 1839, concluded that

all animals are made of cells. Virchow: in 1855, proposed that all

cells come from other cellsTogether, these scientists and others

helped to develop the cell theory.

CELL THEORY

1. Living things are composed of cells. 2. Cells are the basic units of structure

and function. 3. Cells are produced by other cells.