cell structure

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structure of cell and the organelles present in it

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Cell Structure And Organelles:

Cell Structure And Organelles

What is a cell?:

What is a cell? Cells are the structural and functional units of all living organisms. All cells come from preexisting cells through cell division. Some organisms, such as bacteria, are unicellular , consisting of a single cell. Other organisms, such as humans, are multicellular , or have many cells—an estimated 100,000,000,000,000 cells.

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Some Examples Of Cells Red Blood Cell Nerve Cell

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Types Of Cells Prokaryotic Eukaryotic

Prokaryotic:

Prokaryotic The prokaryotes are a group of organisms that lack a cell nucleus or any other membrane-bound organelles. Most prokaryotes are unicellular.  Prokaryotes do not have a nucleus, mitochondria, or any other membrane-bound organelles.

Eukaryotic:

An eukaryote is an organism whose cells contain complex structures enclosed within membranes. The defining membrane-bound structure that sets eukaryotic cells apart from prokaryotic cells is the nucleus, or nuclear envelope, within which the genetic material is carried. Cell division in eukaryotes is different from that in organisms without a nucleus (Prokaryote). Eukaryotic

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Cell Organelles Inside And Outside

Nucleus:

Nucleus It is a dense granular body present inside the cell , surrounded by the cytoplasm. Its functions are :- To control all metabolic activities of the cell. Responsible for cell division Responsible for transmission of genes.

Endoplasmic Reticulum:

Endoplasmic Reticulum These are fine tubule- like structures that extend from nuclear membrane to the cell membrane. They form a link between the cell cytoplasm and the nuclear membrane, this helps in transportation of substances from one reign to another.

Mitochondria:

Mitochondria It is second largest organelle with unique genetic structure. Mitochondria are sometimes described as "cellular power plants" because they generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy.

Golgi Apparatus :

G ol gi A p par at us It was identified in 1898 by the Italian physician CamillO Golgi and is named after him. It is  found in most eukaryotic cells.

Lysosomes:

Lysosomes Lysosomes are cellular organelles that contain acid hydrolase enzymes to break down waste materials and cellular debris. They can be described as the stomach of the cell.

Plastids:

Plastids Plastids are major organelles found in the cells of plants and algae. There are 3 types of plastids :- Chloroplasts (colorful) Chromoplasts (colorful except green) Leucoplasts (colorless & store oil) 1. 2. 3.

Vacuoles:

Vacuoles A vacuole is a membrane-bound organelle which is present in all plant and fungal cells . Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution.

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Presented By : Parvaz Virk Std 9 th B

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