Introduction into Cell Biology - comed.uobaghdad.edu.iq... What is Life made of? What is a cell...
Transcript of Introduction into Cell Biology - comed.uobaghdad.edu.iq... What is Life made of? What is a cell...
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Introduction into
Cell Biology
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Aim :
.To provide an understanding of the relationship between the STRUCTURE AND FUNCTION of CELLS and their ORGANELLES and the EXTRACELLULAR MATRIX .
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Objectives
Students should be able to :
• Identify the cell .
• Characteristic of cell and life .
• list the properties of prokaryotic and eukaryotic cells .
• Cell types.
• Cell theory .
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Cell Structure & Function
http://koning.ecsu.ctstateu.edu/cell/cell.html
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What is Life made of?
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What is a cell
• structural and functional units of all living organisms
• A cell is the smallest unit that is capable of performing life functions
• unicellular and multicellular organisms
bacteria vs. human
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Characteristics of Cells and Life
• Cell :
• All living things (single and multicellular) are made of cells that share some common characteristics:
– basic shape : spherical, cubical, cylindrical
– internal content : cytoplasm, surrounded by a membrane
– DNA chromosome(s), ribosomes, metabolic capabilities
• Two basic cell types: eucaryotic and procaryotic
• Life :
Growth , Reproduction, Metabolism , Movement , protection, and storage , Transport of nutrients and waste
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Examples of Cells
Amoeba Proteus
Plant Stem
Red Blood Cell
Nerve Cell
Bacteria
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Chapter 5 9
The Cell Theory
1. Every living organism is made up of at least one cell.
2. Cells are the basic structural and functional units of organisms.
3. All cells arise from preexisting cells.
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Cell Biology
-> All living organisms are made out of cells -> Cells are the smallest living unit
Human egg cell + sperm
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Cell Biology
Single cell organisms – Multi cell organisms -> Single cell organisms -> Microorganisms
Bacteria Archea
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Cell Biology
-> multi cell organisms -> higher degree or organization of cells within the organism -> specialization of cells
Human red blood cells Plant cells Human skin cells
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Cell Types
• Prokaryotic: – Smaller, 1—5 µm – No organelles – No nucleus – DNA in circular loop – - Binary fission
• Eukaryotic: – Larger, 8—100 µm – Membranous organelles – Nucleus – DNA in linear chromosomes – Cell growth by cell division
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Cell Biology
Two cell types - The Three Domain System
Prokaryotes
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Cell Types
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Protozoa
Euglena
Amoeba
Paramecium
Cell Biology
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summery • cell is the smallest structural and functional units
of all living organisms. Every living organism(Single cell organisms – Multi cell organisms) is made up of at least one cell.
• All cells arise from preexisting cells.
• life is represented by growth , reproduction ,
Metabolism and Movement , etc.
Cells are of 2 types : Prokaryotic and Eukaryotic
.