Notes
Slide Show
Outline
1
Cell Structure
& Function
2
Cell Theory
  • All living things are made up of cells.
  • Cells are the smallest working units of all living things.
  • All cells come from preexisting cells through cell division.


3
Definition of Cell
  • A cell is the smallest unit that is capable of performing life functions.
4
Examples of Cells
5
Two Types of Cells
  • Prokaryotic
  • Eukaryotic
6
Prokaryotic
  • Do not have structures surrounded by membranes
  • Few internal structures
  • One-celled organisms, Bacteria


7
Eukaryotic
  • Contain organelles surrounded by membranes
  • Most living organisms


8
“Typical” Animal Cell
9
“Typical” Plant Cell
10
Cell Parts
  • Organelles
11
Surrounding the Cell
12
Cell Membrane
  • Outer membrane of cell that controls movement in and out of the cell
  • Double layer
13
Cell Wall
  • Most commonly found in plant cells & bacteria
  • Supports & protects cells


14
Inside the Cell
15
Nucleus
  • Directs cell activities
  • Separated from cytoplasm by nuclear membrane
  • Contains genetic material - DNA
16
Nuclear Membrane
  • Surrounds nucleus
  • Made of two layers
  • Openings allow material to enter and leave nucleus
17
Chromosomes
  • In nucleus
  • Made of DNA
  • Contain instructions for traits & characteristics


18
Nucleolus
  • Inside nucleus
  • Contains RNA to build proteins
19
Cytoplasm
  • Gel-like mixture
  • Surrounded by cell membrane
  • Contains hereditary material
20
Endoplasmic Reticulum
  • Moves materials around in cell
  • Smooth type: lacks ribosomes
  • Rough type (pictured): ribosomes embedded in surface
21
Ribosomes
  • Each cell contains thousands
  • Make proteins
  • Found on ribosomes & floating throughout the cell
22
Mitochondria
  • Produces energy through chemical reactions – breaking down fats & carbohydrates
  • Controls level of water and other materials in cell
  • Recycles and decomposes proteins, fats, and carbohydrates
23
Golgi Bodies
  • Protein 'packaging plant'
  • Move materials within the cell
  • Move materials out of the cell
24
Lysosome
  • Digestive 'plant' for proteins, fats, and carbohydrates
  • Transports undigested material to cell membrane for removal
  • Cell breaks down if lysosome explodes
25
Vacuoles
  • Membrane-bound sacs for storage, digestion, and waste removal
  • Contains water solution
  • Help plants maintain shape


26
Chloroplast
  • Usually found in plant cells
  • Contains green chlorophyll
  • Where photosynthesis takes place