Wednesday, March 7, 2012

What is the smallest type of cell in our bodies?

The largest cell is the egg cell and measures about 100 micrometers (I think), the size of a pencil dot on a piece of paper. Which is the smallest and how much does it measure?What is the smallest type of cell in our bodies?
Ah but pity the poor sperm cell! It only exists to carry that package.



No mitochondria from the sperm ever enter the egg; thus, mitochondrial DNA is all from the mother. We can trace all of our mitochondria back to the primordial Eve, the mother of us all. Isn't that smurfy!?



Actually, some nerve cells are smaller in diameter but the sperm is the smallest in volume since those nerve cells have long "processes" (stringy bits).What is the smallest type of cell in our bodies?
The smallest cell is the sperm cell. It is one-tenth the diameter of a human hair.What is the smallest type of cell in our bodies?
Foundation is right, the smalles cell is the sperm cell. Not to take away from his/her answer, but in addition: sperm cells in humans are small for a particular reason. Their nuclei, the place that contains the genetic material, is highly condensed. In a process called spermiogenesis the DNA is repeatedly wrapped up, tihtened, and packed closer and closer, so that at the end the nucleic material is a very, very dense package. Simultaneously, the cell organelles otherwise typical for cells in the body are reduced and the shape of the cell is altered. A flagellum, or tail, is formed, and at its basis a few mitochondria are kept as the motors to drive the flagellum. By means of this flagellum, the sperm cell can then swim up the uterus to meet the egg cell and fertilize it. This is exactly the reason why the cell is so small: It is necessary for the sperm cell to move and to move a long distance. To achieve this goal it has to be light, so that the fuel produced by the mitochondria will suffice to reach the target area. I hope this helps.

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