8/9/2019 Cells[1].pptx

1/18

Cells

HSB

8/9/2019 Cells[1].pptx

2/18

Objectives

1. Draw and label diagrama to showthe structure of the unspecializedanimal and plant cells

. State the function of organelles

8/9/2019 Cells[1].pptx

3/18

!ntroduction•

" cell is the basic organizational unit of allliving organisms.

•  #he$ are found in all living organisms

•  #he$ are composed of organelles whichenables the cells to carr$ out there functions

•  #here are two basic t$pes of cells% – "nimal

 – &lant

8/9/2019 Cells[1].pptx

4/18

•  #he cells have% – 'ucleus% this control all the activities in

the cell. !t also contains the instructionsfor ma(ing new cells or new organismsin the form of long threads (nown aschromosomes) which is the genetic

material.

"nimal Cells

8/9/2019 Cells[1].pptx

5/18

 – C$toplasm% a li*uid gel in which mostchemical reaction ta(e place. Sevent$

percent of the c$toplasm of a cell isactuall$ water. #he c$toplasm containsall the other organelles in the cell.

8/9/2019 Cells[1].pptx

6/18

• Cell membrane% #his forms a barrier li(e aver$ thin s(in around the outside of thecell. #he cell membrane control the

movement of substances in and out of thecells. !t is called a selectivel$ permeablemembrane. !t allow material to passthrough the membrane based on their

concentration in the cell.

8/9/2019 Cells[1].pptx

7/18

• +itochondria% these are called thepower house of the cell. #he$ carr$

out the process of respiration most ofthe time. !t is where energ$ isreleased from food in the form of "#&

which is what the cell can use. #henumber of mitochondria varies basedon the amount of the energ$ needed.

8/9/2019 Cells[1].pptx

8/18

• "#&, adenosine triphosphate

• "D&,adenosine diphosphate

8/9/2019 Cells[1].pptx

9/18

• -ibosomes are found on themembrane stac(s called endoplasmic

reticulum which run through thec$toplasm of $our cells. #hesestac(s are involved in the

manufacture) pac(aging andtransport of man$ dierentsubstances. #he ribosomesthemselves are vital for proteins$nthesis.

8/9/2019 Cells[1].pptx

10/18

• /acuole% these are small and store

gl$cogen. #he$ disappear andreappear as needs be.

8/9/2019 Cells[1].pptx

11/18

•  #he cells have% – 'ucleus% this control all the activities in

the cell. !t also contains the instructionsfor ma(ing new cells or new organismsin the form of long threads (nown aschromosomes) which is the genetic

material.

&lant cells

8/9/2019 Cells[1].pptx

12/18

 – C$toplasm% a li*uid gel in which mostchemical reaction ta(e place. Sevent$

percent of the c$toplasm of a cell isactuall$ water. #he c$toplasm containsall the other organelles in the cell.

8/9/2019 Cells[1].pptx

13/18

• Cell membrane% #his forms a barrier li(e aver$ thin s(in around the outside of thecell. #he cell membrane control the

movement of substances in and out of thecells. !t is called a selectivel$ permeablemembrane. !t allow material to passthrough the membrane based on their

concentration in the cell.

8/9/2019 Cells[1].pptx

14/18

• +itochondria% these are called thepower house of the cell. #he$ carr$

out the process of respiration most ofthe time. !t is where energ$ isreleased from food in the form of "#&

which is what the cell can use. #henumber of mitochondria varies basedon the amount of the energ$ needed.

8/9/2019 Cells[1].pptx

15/18

• -ibosomes are found on themembrane stac(s called endoplasmic

reticulum which run through thec$toplasm of $our cells. #hesestac(s are involved in the

manufacture) pac(aging andtransport of man$ dierentsubstances. #he ribosomesthemselves are vital for proteins$nthesis.

8/9/2019 Cells[1].pptx

16/18

• /acuole% these are large and storesucrose. #he$ are permanent and0oats around in the c$toplasm. #heare separate from the c$toplasm b$ atonoplast. #he$ store food in the

form of sucrose solution and mineralion dissolved in water.

8/9/2019 Cells[1].pptx

17/18

• Chloroplast are found in all greenparts of the plant. #he$ contain

chloroph$ll which re0ect green lightthus the green colour the chloroph$llabsorb sun light which is used in the

process of photos$nthesis.

8/9/2019 Cells[1].pptx

18/18

• Cell wall% these are found onl$ inplant cells. #he$ are made mainl$

from cellulose and give the cellstructural integrit$. !t is found outsidethe cell membrane