How big is a body cell?
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Just stand in front of the mirror then you know how big our human cells
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It has nothing to do with surface area/volume ratio of their cells. Surface area/volume ratio is only a factor when you are talking about single cell species. In multi-cell species, such as bears, humans, ants, elephants, trees,...... it is the number of the cells that determine their size: a baby has a smaller size than an adult human because he has fewer cells not because his cells are smaller than an adult.\nIn case of polar bear vs. black bears size, other than the number of the cells, the amount of fat they have reserved in their body is another factor.
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The size of your brain :)
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Your skin is your largest organ. It covers your entire body and has a surface area of around 2 square metres. Its thickness varies from 0.5mm on your eyelids to 4mm or more on the palms of your hands and the soles of your feet. In total, it accounts for around 16 percent of your body weight.
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The normal adult human brain typically weighs between 1 and 1.5 kg (2.2-3.3 lb) and has an average volume of 1,600 cm³ (98 in³). An average male brain has approximately 4% more cells and 100 grams more brain tissue than an average female brain. However, both sexes have similar brain weight to body weight ratios
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Depends on the cell type labile, stable, non regenerative etc
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http://en.wikipedia.org/wiki/Human_cells
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about the size of ur fist...<<<<<<
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Cells are not all of the same size, but average size is close to 15 micrometers.
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Human hair varies considerably in thickness; however, 100 micrometers is generally taken as the average.\n\nCell sizes vary, too, but the average hair cell is 10 micrometers across.\n\nOn that basis, I'd say the average human hair is about 10 cells thick.
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about:\nmale: 4.7 to 6.1 million cells/mcl \nfemale: 4.2 to 5.4 million cells/mcl
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Your body makes cells by the process called mitosis.\n\nHere's a website on mitosis:\nhttp://www.cellsalive.com/mitosis.htm
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New body parts grow by division of stem cells at the base. They divide, differentiate into the correct cells and grow larger. The bulk of cells dividing and growing larger provides the "pushing" out of new tissue.
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The larger something is, the greater the volume is compared to surfac area.  Volume grows as a cube of the radius, while surface area grows as the square of the radius.  So, if a cell gets twice as large in diameter, the surface area grows by 4-fold, while the volume grows by 8-fold.  This is why small animals are so much more vulnerable to cold, because they have greater relative surface area through which to lose heat, while large animals have the opposite problem-not enough surface area to get rid of the heat generated in the large volume.
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Unfortunately there isnt any average cell-as said before, there is variation from minutes, in the case of some immune and germ cells, to never in the case of most neurons.  But, to give you a way to answer your homework, you can say a hypothetical cell takes 24 hours to divide-there are quite a few cell types that take about this long, so you would be safe choosing this time.
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The longest cells in the human body are the motor neurons. They can be up to 4.5 feet (1.37 meters) long and run from the lower spinal cord to the big toe. The longest living cells in the body are brain cells which can live an entire lifetime.
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Cell bio would encompass all things on a cellular level.\nUsually organisms with a "life of their own".\nMolecular bio goes further into the atomic level.\nEg: a molecule of water (H2O) consists of 3 atoms. take a H away and you have Hydrogen peroxide(HO). A cell is usually made up of many different molecules when added together, make an organism like a liver cell, cancer cell, stem cell,etc...