Download Introduction to Cells

Introduction to Cells!
Recall the Cell Theory:

All living things are made of one or more
cells.

All cells come from other cells.
(Therefore, all living things come from
other living things.)
Robert Hooke



England (1665)
Used a very simple
microscope
Looked at many things
(feathers, fish, fly wings,
fungi)
One day he looked at a slice of cork under his
microscope.



They reminded
him of the little
rooms where
monks prayed.
This is his
actual drawing
of what he saw.
So what is
Hooke
remembered
for?
At the same time, a man named Anton van Leeuwenhoek was
also looking through a simple microscope.





Anton van Leeuwenhoek
Holland (1673)
He looked at blood from many animals.
He also looked at pond water. Called them “animalcules”.
How is his discovery different from Hooke’s?
So what ARE cells?

many shapes

many sizes

many colors

many different
functions
Cells have many parts, but all cells have these
three MAIN parts:

cell membrane

cytoplasm

nucleus
The three main parts to a cell:
ALL CELLS
CELL MEMBRANE:
holds cell together
lets some materials in/out
CYTOPLASM:
means "cell fluid"
NUCLEUS:
control center