THESE POEMS AND PICTURES CONTINUE TO ILLUSTRATE THE STORY OF CELL SECRETS PRESENTED IN CHAPTER 3 ; 4 CELL ORGANELLE HAVE ALREADY BEEN DESCRIBED EARLIER NOW 3 MORE - CELL MEMBRANE ,ENDOPLASMIC RETICULUM AND CYTOSKELETON HAVE BEEN COVERED HERE DESCRIBING THERE STRUCTURE & FUNCTIONS IN POETIC FORMAT.

1. Jeev jagat Om ki Adharshila
Diagram of Cell membrane
Lady of Hats – Wc – Public domain
Nanoscale image of the membrane of a living cell-a bacillus
Oak Ridge National Laboratory- Mike Mcrae –Nature-Science alert.com

2. Jeev Jagat poem ki Adharshila
Cell membrane
They call me cell membrane
But I am really Plasma membrane
A thin flexible bilayer of amphipathic lipids
embedded with a variety of proteins
containing all the contents of a cell
within my ambit and making a cell
look like a baloon filled with fluid
in which smaller baloons or capsules
of various types were floating freely
as if in a pool .
That gell like fluid – the cytoplasm
Those minuscule bodies – the organelles
are my precious possessions & protégé!
in my care and protection always.
I surround the cell like a fort wall
with gates controlling entry & exit of all
made possible by my constituents and structure
turning me into a unique bio film of one and all

3. Jeev jagat Ki Adharshila
My lipid components are mainly three
Phospholipids ,Glycolipids and Sterols
inbuilt in me
but phospholipids with hydrophilic heads
and long hydrophobic tails predominate
They keep me in liquid crystalline state
The Cholesterol stiffens ,strengthens
and regulates my fluidity always
even when temperature fluctuates.
Together all these three are responsible for
my main characteristics.
My proteins are also mainly three
Of Integral ,anchored and peripheral types
responsible for many of my features,
roles and activities.
The integral ones are transmembrane proteins spanning me
including protein channels ,proton pumps ,as well as
G protein coupled receptors which are major players
in signaling and transportation across me.

4. Jeev Jagat ki Adharshila
The ion channels allow ions and small molecules
to diffuse and also determine my electricalproperties
Among the peripheral proteins
are some Enzymes and some hormones ,
which along with anchored G proteins
play great role in transmission of signals
I am not a semipermeable membrane only
but am also involved in many other activities
such as cell adhesion ,and ion conductivity, ;
And I also act as an attachment for cell wall
and carbohydrate calyx on the outer side and
the cytoskeleton on the inside, of a cell.
And now you tell me Sir
Am I not an organelle myself ?
or like one and as important
as any other in a living cell
or perhaps even more, as !
I also protect them all .

5. Jeev Jagat Endoplasmic reticulum Ki Adharshila
Nucleus -Endoplasmic reticulum - Golgi apparatus
Magnus manske , P Broks – Wc – cc
3-4 ER & 9-10 Golgi
3 D rendering of Endoplasmic reticulum
Bruce blaus – Wc – cc

6. Jeev jagat ki Adharshila
ER in a Lung Cell-TEM
Louisa Howard – Wc – cc
Endoplasmic reticulum
A winding network of membranous tubules
continuous with nuclear membrane
and looking like flattened sacs
I am a large organelle spread like folded sheets
adjacent to nucleus in all Eukaryotic cells
A part of me is always studded with
lots of tiny ribosomes giving me
the name of rough endoplasmic reticulum
which processes proteins and transports them.

7. Jeev jagat ki Adharshila
The other part remains smooth
and plays role in the synthesis
of Lipids and Steroids such as
Cholesterols and hormones.
A specialized part of it is
also Involved in Ca+ storage
and its timely release.
My functionsalso include such duties
as drug detoxification and attachment
of cell membrane proteins.
Transport vesicles keep shuttling
between me and Golgi bodies
targeting mostly new proteins
to their destinations in or out of cells.
Actually I am an important part
of transportation system as well
and ensure timely supply of proteins
and lipids etc to all other organelles.

8. Jeev jagat ki Adharshila
To my mind it looks like a
longish chemistry lab surely
famous for its role in, mainly
synthesis , folding and tagging
of proteins,
and sending them in vesicles
wherever need be ,
although it carries on merrily
many more functions undoubtedly .

9. Jeev jagat Cytoskeleton Ki Adharshila
Pulmonary artery –Endothelial cells – fluorescent cells
Cytoskeleton - Wc – Public domain
Actin filaments – Red ; Microtubules - Green ; Nucleus –Blue
Actin microfilaments of Mouse Embryo fibroblasts
T tambe – Wc –cc

10. Jeev jagat Ki Adharshila
Actin filament
Lydiawc – Wc – cc
Keratin filaments in Embyonal carcinoma cells
Jamie Bush & John Schmidt Wc - cc

11. Jeev Jagat Ki Adharshila
Microtubule structure
Lydiawc – Wc – cc
Cytoskeleton
I am a Dynamic frame work of Protein filaments
In all living cells many essential functionsI do perform
My main workhorses are three
As Micro filaments , Intermediate filaments
and Micro tubules are known these,
Are made of Actin , Keratin / desmin ,/lamins .,
and Tubulins respectively in eukaryote beings .

12. Jeev jagat Ki Adharshila
Microfilaments are really thin
two strands of Actin wound in a spiral chain
They aid in cytokinesis , motility , streaming
of cytoplasm , muscle contraction & signaling .
and act as tracks for Myosin motors
moving merrily here & there various vesicles ;
The intermediate filaments are made of
many varieties of proteins
In cytoplasm those of keratins and desmins
maintain cells shape , bear tensions
and provide cell sufficientstructural support .
those of lamin in the Nucleus similarly act as
nuclear envelope’s main support .
The microtubules are hollow contractile tubes of Tubulins
Acting as tracks for Myosin motors
carrying cargo here and there within the cells,
form & function as spindle during cell division
and assist in chromosome segregation ,
provide polarity , attach to cell membrane
and aid in signal transmission .

13. Jeev jagat Ki Adharshila
Also assist in Endocytosis ;
Play role in synthesis of cell wall
and form Cilia ,&,flagella in some beings.
The most fascinating feature of cytoskeleton
however ,appears to be :
quick disassembly and reassembly
of Actin filaments and Microtubules,
and movement of Myosin motors
on them like a drunkard walking after a spree .
All in all it gives shape , structure and
organization to cytoplasm of the cells
and constantly undergoes remodeling
to fulfill, from time to time, various roles
Besides cytoplasm’s skeleton there is also
Membrane skeleton in a cell playing similar roles
Spectrin is the major player here upholding it
assisting it in some of its functionsand goals.
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