AN OVERVIEW OF THE CELL




All the students must know about Types of cells, Size of cells, Prokaryotic or Eukaryotic, Plant and Animal cell, Chromosome, Nucleus, Ribosomes.


First of all talk about Onion cell and Cheek cell.

ONION CELL
** Onion cell is a type of plant cell.
**Distinct cell wall. Distinct meaning different.
** Outer boundary is just within cell membrane.

CHEEK CELL

**Outer membrane has dilimiting structure.
**Inside each cell, dense membrane structure called NUCLEUS.
** Nucleus contain genetic material DNA- DEOXYRIBO NUCLEIC ACID.


##PROKARYOTIC CELL
*Membrane bound nucleus absent.
*Cytoplasm present.

Membrane bound organelles absent.


##EUKARYOTIC CELL
*Membrane bound nucleus present.
*Cytoplasm present.

Membrane bound organelles present.

##CYTOPLASM 
** Main area of cellular activities in both plant and animal cells.


         @@@ RIBOSOMES@@@

Non membrane bound organelle


Presenrt in both Prokaryotic and Eukaryotic cells.

Present in chloroplast in plant cells.

Mitochondria and rough endoplasmic reticulum.



SIZE OF CELLS

LARGEST CELL and SMALLEST CELL

OSTRICH EGG.       LARGEST

MYCOPLASMA        SMALLEST



LARGEST AND SMALLEST CELL IN HUMANS.




LONGEST CELL

NERVE CELL





SHAPE OF CELLS

*Polygonal
*Columnar
*Cuboid
*Thread like 
*May be irregular




**Red blood cells 

Diameter.  7.0um



NUCLEUS


CYTOPLASM



RIBOSOMES


CELL ORGANELLES



PROKARYOTIC AND EUKARYOTIC




PLANT CELL



ANIMAL CELL


CHROMOSOME



AN OVERVIEW OF THE CELL




DR SUNDIIP SINGH

THANK YOU