Cell Structure Payalb Ldh

SCHOOL NAME GOVT. SEN. SEC.SCHOOL. PAYAL.

Guided by  

Mrs. Ranjit Kaur Gill. Mrs. Neerja

STUDENT NAME 

    

NAME NO. GURPREET JAGDISH DARSHAN SUMIT HARJEET

CLASS 9TH 9TH 9TH 9TH 9TH

ROLL 2 3 12 15 17

PROJECT NAME STRUCTURE OF CELL

STRUCTURE OF CELL 

LET US NOW LEARN ABOUT THE STRUCTURE OF THE CELL AS SEEN UNDER THE LIGHT MICROSCOPE. THOUGT THEIR SHAPE,SIZE AND ACTIVITIES VARY,ALL CELLS HAVE THREE MAJOR FUNCTIONAL REGIONS,VIZ. PLASMA MEMBRANE, NUCLEUS AND CYTOPLASM.

PLASMA OR CELL MEMBRANE 

IT IS THE OUTER COVERING OF EACH CELL, WHICH SEPARATES ITS CONTENTS FROM THE SURROUNDING MEDIUM. IT IS MADE UP OF LIPIDS AND PROTEIN AND PROVIDES A MECHANICAL BARRIER FOR THE PROTECTION OF THE INNER CELL MEMBRANE IS TO REGULATE THE MOVEMENT OF MOLECULES IN AND OUT OF THE CELL.PLANT CELL,IN ADDITION,HAVE A RIGID CELL WALL THAT LIESAT LIES OUTSIDE THE PLASMA MEMBRANE.

NUCLEUS 

IT IS A PROMINENT,SPHERICAL OR OVAL STRUCTURE,USUALLY LOCATED NEAR THE CENTRE OF THE CELL.IT IS THE CONTROLLING CENTRE OF ALL CELL ACTIVITIES.IT IS A ENCLOSED BY A DOUBLE-LAYERED MEMBRANE,CELLED NUCLEAR MEMBRANE,WHICH SEPARATES IT FROM THE CYTOPLASMA.THE NUCLEAR MEMBRANE HAS SOME PORES,WHICH ALLOW THE TRANSFER OF MATERIALS BETWEEN THE NUCLEOPLASM CONTAINED INSIDE NUCLEUS AND THE CYTOPLASM.THE CHIEF COMPONENTS OF THE NUCLEUS ARE :(1)CHR0MATIN MATERIAL (2)NUCLEOLUS.

CYTOPLASMA 

IT IS THE REMAINING PART OF THE CELL OTHER THAN THE NUCLEUS.IT CONTAINS VARIOUS CELL ORGANELLES. THESE ORGANELLES PERFROM DIFFERENT FUNCTIONS OF THE CELL.

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