ORGANELLES
Organelles rarely fell to organize every cell. Cells organize into tissues very well.
Organs make up systems that become us organisms. In organisms like you and me, organelles are the key.
All our chemical reactions, without thought or distractions occur inside our cells’ organelles.
CYTOSKELETON
The cellular cytoskeleton is like its name. It gives the cell some structure, like a frame.
Now its basic elements, Microtubules & microfilaments
Are similar, but are not quite the same.
While filaments stay in a groove, tubules like to move.
VESICLES
(LYSOSOMES)
Lysosomes are the stomachs of the cell. They digest amino acids very well.
If their digestive enzymes leak, things would soon be very bleak.
Oxygen deprivation’s a death knell.
Endocytosis brings some stuff inside. Like triglycerides & polypeptides.
Lysozymes help break them down, then the cell turns right around,
to synthesize whatever it decides.
(PEROXISOMES)
Peroxisomes will take a toxic compound, and with catalases break a poison down.
But what is left inside...is hydrogen peroxide, and that can break an organism down.
Peroxisomes have peroxidase, to stop hydrogen peroxide in its place.
And that is what is meant by an anti-oxidant, so cellular degeneration is denied.
(VACUOLES)
Like other ‘somes’, animal vacuoles are small.
Some may not contain much of anything at all.
Special hydrolysers, and stored food appetizers,
are utilized when a cell makes a call.
Good things not saved to eat, vacuoles secrete.
What waste they will not keep, vacuoles excrete.
RER & SER
Endoplasmic reticula come in twos.
The one without the ribosomes is smooth.
The other has the stuff, and so they call it rough.
Protein synthesis is what they’re meant to do.
The rough one is for protein modification
for reactions like protein transformation
are needed at all times, so they change into enzymes
for the entire organism’s regulation.
Smooth ER is just for this: lipid & carbohydrate synthesis.
NUCLEUS & NUCLEOLUS
A eukaryote nucleus has an envelope membrane surrounding chromosomes of DNA.
And there’s this other thing, a nucleolus by name that produces ribosomal RNA.
Chromosomes used for cellular regulation, use Ribosomes in protein generation.
GOLGI BODY
The Golgi apparatus packages things, like enzymes & other kinds of proteins.
Here vesicles are needed, so stuff can be secreted by Exocytosis via cellular membranes.
MITOCHONDRIA
Mitochondria, the cellular power source,
help proteins and things to run their course.
The membrane is double walled, so a process that is called
the Krebs cycle can make energy, that is stored as ATP.
CHLOROPLASTS
Green machines called chloroplasts are definitively one of nature’s blasts.
They use the energy of the Sun, and with water and dioxide of hydrogen,
assemble sugars by doing this: the process of photosynthesis.
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