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"EXPLORING THE CELL THEORY"

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isabelle McD

on 6 May 2015

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Transcript of "EXPLORING THE CELL THEORY"

STEM CELLS
Rudolph Virchow
He stated that all living things come from other living things, creating the 3rd point ofthe cell theory. "Omnis cellula e cellula”… “ All cells only arrive from pre-existing cells.”

Zacharias Janssen
1 Jan 1590
Theodor Schwann and Matthias Schleiden
THE CELL THEORY
1. all known living things are made up of cells.

 2. the cell is the structural & functional unit of all living things.

 3. all cells come from pre-existing cells by division.
(Spontaneous Generation does not occur).

"EXPLORING THE CELL THEORY"
Zacharias Janssen, a Dutch eyeglass maker, creates the first microscope. Lead to the first citing of a cell, thus leading into the cell theory.
In 1838, Theodor Schwann and Matthias Schleiden were both starting to dicover cells and how they worked. When Schwann heard Shleiden describe plant cells with nuclei he noticed that the plant cells were similar to the animal tissues he had observed.

Schleiden summarized 3 conclusions of all cells:
1)  The cell is the unit of structure, physiology, and organization in living things.
2)  The cell retains a dual existence as a distinct entity and a building block in the construction of organisms. 

3)  Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation).


"The Oldern day Cell Theory"
Schleiden summarized 3 conclusions of all cells:

1)
  The cell is the unit of structure, physiology, and organization in living things.

2)
  The cell retains a dual existence as a distinct entity and a building block in the construction of organisms.

3)
  Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation).

We know today that the first to points are right… but not the third. The correct interpretation of cell formation is “Omnis cellula e cellula”… “ All cells only arrive from pre-existing cells.”


TIMELINE LEADING TO
DISCOVERY OF THE CELL THEORY

"Ancient Egyptians"
1 Jan 200
They discovered that the human body is made of many components working together. This is point 2 of the cell theory.
Aristotle
334 B.C.E
Begins to observe nature.
Classifies all living things as a plant or animal.
Writes that all living things arise from non-living matter.
Robert Hooke
He discovered cells by looking at a piece of cork. He named the small boxes he saw, "cells".
Anton van Leewenhoek
Improved magnification of microscopes
Discovered "animacules"
Dicovered bacteria from a sample of saliva frm his mouth.
1674-1683
Matthias Schleiden
He discovered that plants were made up of cells.
1838
Meanwhile...
Theodor Shwann
1838/1839
Discovered that animals were made up of cells and later on concluded that all tissues were made of cells. Theodor also discovered enzyme pepsin.
Animal Cell
AND ALL OF THESE PEOPLE HAVE
PUT TOGETHER AND CREATED THE CELL THEORY!
WHAT ARE STEM CELLS?
Stem cells are different from other cells in the
human body. These cells are a repair system for tissues, organs, organ systems in the body.
MAIN CHARACTERISTICS OF STEM CELLS:
1665
1855
Stem cells can divide and renew themselves
Stem cells are unspecialized
Stem cells can give rise to specialized cells
Stem cells relate with the 2 principles of the cell theory:

All living things are made up of stem cells
Stem cells divide to create more stem cells


WHAT ARE EMBRYONIC STEM CELLS?
They are extracted from embryos and can give rise to virtually any specialised cell in the human body.
Stem Cell MEDICAL TREATMENTS
Leukemia Cancer
Lymphoma
Alzheimers
Parkinsons Disease
Type 1 Diabetes
Stroke
Shleiden summarized 3 conclusions about all cells:
The cell is a unit of structure, sicology and organization in all living things
The cell is a building block in the constuction of organisms.
Cells form from non-living matter
Stem Cells in Science Research
Scientists are starting to test and create organs and body parts with stem cells like:

Hearts muscle cells
Growth of new blood vessles to regenerate damaged heart tissue.
Tooth regeneration
Deafness
Blindness and Vision Impairment
Infertility
BIBLIOGRAPHY
http://www.bio.miami.edu/~cmallery/150/unity/cell.text.htm
http://www.cpschools.com/Schools/OSM/theory.htm
https://www.timetoast.com/timelines/the-cell-theory--7
http://www.slideshare.net/raiuniversity/bsc-biochemistry-ii-cellular-biochemistry-unit-1-basics-of-cell
http://www.explorestemcells.co.uk/WhatAreStemCells.html
http://www.ib.bioninja.com.au/standard-level/topic-2-cells/21-cell-theory.html
MEDICAL USE OF STEM CELLS
The issue of stem cells being used for medical purposes is mainly a conflict between religious and ethical points of view and scientific points of view on the other hand.
PROS:
Stem cell research could be extremely beneficial to many people, it could be a way to create new therapies for many diseases.

Cons:
Stem cells are seen by many people as potential human lives.
For stem cell medical treatment they would need to use human beings for medical testing.


https://explorable.com/stem-cell-pros-and-cons
http://www.enotes.com/homework-help/what-pro-cons-stem-cells-446366
JOSEFA RODRIGUEZ
CATALINA RAICICH
ISABELLE MCDANIEL
THANK YOU FOR LISTENING:)
Full transcript