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The Cell: The Basic Unit of Life

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... cells and have a nucleus and membrane-bound organelles (plants, fungi, & animals) ... Iris diaphragm. Revolving nosepiece. Objective. Clip. Condenser ... – PowerPoint PPT presentation

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Title: The Cell: The Basic Unit of Life


1
The Cell The Basic Unit of Life
  • Revised by Jannie Dee Jenkins
  • October, 2007

2
The cell is the Basic Unit of Life
  • The cell is the smallest unit of living organisms
  • Unicellular organisms are made of one cell only
  • The cells of multicellular organisms are
    specialized to perform different functions

3
Basic Types of Cells
Animal Cell
Plant Cell
Bacterial Cell
Cells can only be observed under microscope.
4
Number of Cells
  • Organisms may be
  • Unicellular composed of one cell
  • Multicellular- composed of many cells

5
Cells May be Prokaryotic or Eukaryotic
  • Prokaryotes include bacteria and lack a nucleus
    or membrane-bound structures called organelles
  • Eukaryotes include most other cells and have a
    nucleus and membrane-bound organelles (plants,
    fungi, animals)

6
Two Main Types of Eukaryotic Cells
Animal Cell
Plant Cell
7
Organelles(Different parts of Cell)
  • Very small size
  • Can only be observed under
  • microscope
  • Have specific functions
  • Found throughout cytoplasm

8
Organelles Found in Plant and Animal Cells
9
Nucleus (Both)
Plant
Nucleus
Determines all of a plant cells activities and
the production of new cells.

Animal
10
Chromosomes(Both)
Chromosomes
Threadlike structures that contain information
about the characteristics of the plant
11
Cell membrane(Both)
Cell membrane
A covering that holds the plant cell together
and separates it from its surroundings
12
Cell Wall(Plant)
  • A rigid layer that supports and protects the
    plant cell.

13
CytoplasmBoth
Cytoplasm
A jellylike substance that contains organelles
to carry out specific jobs
14
Chloroplasts(Plant)
Chloroplasts
Contain the green pigment chlorophyll Traps
sunlight to make sugars (food) Process called
photosynthesis
15
Mitochondria(Both)
Mitochondria
Rod shape Release energy from food Cell powerhouse
16
Golgi Bodies
  • The Golgi body packages the ribosomes for
    shipment to and use by other cells and other
    parts of the organism's body.

17
Vacuole
Stores food, water, or wastes
18
Smooth Rough Endoplasmic Reticulum
Smooth and rough tubes that move and store
materials made by the cell
19
Ribosomes
Ribosomes are little dot-like structures on
some of the endoplasmic reticulum they organize
and build proteins for the body.
20
Compound Microscope
  • Instrument for observing small objects
  • Magnify images up to 2000X their size

21
Different parts of a microscope
22
(No Transcript)
23
Practice Time
  • Rags to Riches
  • Matching
  • Cell Inspector
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