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There are approximately 100 trillion
(1014) cells in the human body!
wikipedia
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Cell Central Dogma:
DNA  RNA  PROTEINS
wikipedia
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wikipedia
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There are more bacterial cells in
the body than human cells!
http://biology.about.com/b/2009/10/27/10-facts-about-cells.htm
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Every human spent about half an
hour as a single cell!
http://icantseeyou.typepad.com
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Three hundred million cells die in
the human body every minute!
http://icantseeyou.typepad.com
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Every day an adult body produces
300 billion new cells!
http://icantseeyou.typepad.com
wikipedia
Blood circulates 20-30 trillion red
blood cells!
wikipedia
The largest cell is an ostrich egg (3.3
lbs) and the smallest cell is
Mycoplasma bacteria
There are 2 meters (6.5 ft) of DNA in
the nucleus of a human cell! The
whole body contains 10-20 billion
miles (16-32 billion km)!
www.getbodysmart.com
Most of the RNA mass of a cell is
found in the ribosomes!
www.getbodysmart.com
Did you know that you inherit your
mitochondria from you mother?
wikipedia
The mitochondrion is considered
the “powerhouse” of the cell!
The number of mitochondria per cell
varies between one and 10,000, and
averages about 200! Each cell in the human
liver has over 1,000 mitochondria!
www.answers.com
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At any instant each cell contains
about one billion ATP molecules!
About 1023 or one sextillion ATP
molecules normally exist in the body!
http://www.trueorigin.org/atp.asp
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One estimate puts the human brain
at about 100 billion (1011) neurons
and 100 trillion (1014) synapses!
wikipedia
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RNA that can act like enzymes
are called ribozymes!
http://biology.about.com/
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Did you know that the intermediate
filaments of the cytoskeleton are
responsible for creating dandruff?
http://biology.about.com/
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The Golgi apparatus is integral in modifying,
sorting, and packaging these macromolecules for
cell secretion (exocytosis) or use within the cell.
The Golgi apparatus is like UPS!
wikipedia
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In the pancreas, the rough endoplasmic reticulum
(RER) produces insulin.
Endoplasmic means "within the cytoplasm", and
reticulum means "little net"
http://biology.about.com/
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Centrioles are a very important part of
centrosomes, which are involved in organizing
microtubules in the cytoplasm. Microtubules are
an important component of the cytoskeleton!
wikipedia
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Mitochondria have their own DNA, ribosomes
and can make their own proteins. Similar to
bacteria, mitochondria have circular DNA and
replicate by a reproductive process called fission.
http://biology.about.com/
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Evolutionary theory holds to the endosymbiotic
theory, it
is thought that the organelles inside eukaryotes such as
mitochondria and chloroplasts evolved from prokaryotes
that took up residence inside eukaryotic cytoplasm. We do
not uphold this theory due to irreducible complexity
http://www.brighthubeducation.com
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The inner membrane of a mitochondrion
is folded into
compartments called cristae (meaning "box"). The matrix,
or inner space created by the cristae, contains the enzymes
necessary for the many chemical reactions that eventually
transform food molecules into energy.
http://www.encyclopedia.com
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Smooth ER has many different functions, including
the manufacture of lipids (fatlike materials), the
transport of proteins, and the transmission of nerve
messages.
http://www.encyclopedia.com
The Golgi body most unusually shaped organelles.
Looking somewhat like a stack of pancakes, the Golgi
body consists of a pile of membrane-bounded, flattened
sacs. Surrounding the Golgi body are numerous small
membrane-bounded vesicles
http://www.encyclopedia.com
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Microtubules also form small, paired
structures called
centrioles within animal cells. These structures are not
considered organelles because they are not bounded by
membranes. Centrioles are involved in the process of cell
division (reproduction).
http://www.encyclopedia.com
The three types of cytoskeletal fibers are microtubules,
actin filaments, and intermediate filaments.
http://www.encyclopedia.com
Within the nucleus, DNA is translated into a molecule called
messenger ribonucleic acid (mRNA). MRNA then leaves the nucleus
through the nuclear pores. Once in the cytoplasm, mRNA attaches
to ribosomes and initiates protein synthesis
Some vesicles, as noted above, are
used to transport molecules from
the endoplasmic reticulum to the
Golgi body and from the Golgi
body to various destinations.
Special kinds of vesicles perform
other functions as well. Lysosomes
are vesicles that contain enzymes
involved in cellular digestion
Blood makes up around 7% of the
weight of a human body.
Blood contains red blood cells,
white blood cells and platelets.
These blood cells float in a yellow
liquid called blood plasma. Blood
plasma is made up of 90% water
and also contains various
nutrients, electrolytes, gases,
proteins, glucose and hormones.
Red blood cells develop in bone
marrow and circulate in the body
for around 120 days.
Red blood cells have the
important job of carrying oxygen
around the body. They also
contain a protein called
hemoglobin. Hemoglobin contains
iron which combines with oxygen
to give hemoglobin and our blood,
a red color.
Grouping human blood types can be a difficult process and there are currently
around 30 recognized blood types (or blood groups). You might be familiar
with the more simplified “ABO” system which categorizes blood types under
O, A, B and AB. Do you know which blood type you are?
Many generous humans around the world give blood donations every year.
This blood is used in important blood transfusions or made into medication
Each day 400 gallons of recycled
blood are pumped through the
kidneys.
4.5 million Americans will a need
blood transfusion each year.
Blood carries away from the body
waste matter and carbon dioxide.
Two million red blood cells die
every second.
By donating just one pint of blood,
three lives can be saved.
There are approximately 100,000
miles of blood vessels in the
human body.