Download Unit 1: Reproduction

Unit 1: Reproduction
Chapter 5: Cell Growth and
Reproduction Overview
 In this chapter you will learn:
1.) the importance of cell theory in developing a better
understanding of cell biology.
2.) the importance and processes of cell division.
3.) how different organisms use various types of
asexual reproduction for propagation.
* Propagation means to produce offspring.
For example, trees propagate themselves by
scattering seeds.
4.) how to use a microscope and all of its functions.
“Tree Man”
http://interestingstrangefacts.com/dede-koswaratree-man/
“China’s Elephant Man”
http://alveryscottkent.wordpress.com/2013/07/1
8/the-curiosity-of-chinas-elephant-man/
Importance of Cells
 Cells make up every part of the human body: skin, hair,
nails, blood and blood organs.
 Cells are the building blocks of life. Every living
organism is made up of cells. During the 1800’s scientists
constructed what they have come to know as cell theory.
 Cell Theory is based upon three important principles.
1.) All living things are composed of one or more cells.
2.) The cell is the functional unit of life.
3.) All cells come from pre-existing cells.
Two Main Types of Cells
 Eukaryotic Cells – need food in order to live.
- animal and plant cells are
eukaryotic cells
 Prokaryotic Cells – no membrane around their
nuclear material.
- single celled organisms that can
live on their own.
- virus (cold, or flu)
When we talk about cells, just how big
are we talking about?
 http://www.cellsalive.com/howbig.htm
 http://www.brainpop.com/health/geneticsgrowthanddevel
opment/cellspecialization/
 http://www.brainpop.com/health/bodysystems/cells/
 http://www.youtube.com/watch?v=zufaN_aetZI&feature=
related
Taking a look at Cells
There are over 100
trillion cells that
make up the human
body that all started
from a single
fertilized egg.
Though we have
many cells, they all
don’t look alike.
How do Cells Move?
 Outside the cell membrane, some cells have
a flagellum, a whip-like tail that helps the
cell move.
 Some cells have tiny hairs called, cilia, that
either move the cell or the environment
surrounding the cell.