What is the largest cell known to Man?

Answer 1

Its Ostritch's egg -fertilised single cell.Unbelievable isint'it!!

Answer 2

In terms of volume, the largest and smallest cells in the human body are the gametes, or the sex cells. The female gamete, the oocyte (also known as the egg or the ovum), is about 1000 micrometers, or one millimeter, in diameter, which is just visible to the naked eye without the aid of a microscope or other magnification device. It needs this size as nourishment before it implants itself in the uterus. The male gamete, the spermatozoan (also known as the sperm cell), is only about 60 micrometers long, and therefore is the smallest cell of the human body. Various other cell types have various other sizes within this range. Most of the cells in the body are too tiny to be seen without a microscope.

Answer 3

The axons of the giraffe neck are very long (from wiki). You can figure the volume.

Axons and dendrites in the central nervous system are typically only about a micrometer thick, while some in the peripheral nervous system are much thicker. The soma is usually about 10–25 micrometers in diameter and often is not much larger than the cell nucleus it contains. The longest axon of a human motoneuron can be over a meter long, reaching from the base of the spine to the toes. Sensory neurons have axons that run from the toes to the dorsal columns, over 1.5 meters in adults. Giraffes have single axons several meters in length running along the entire length of their necks. Much of what is known about axonal function comes from studying the squid giant axon, an ideal experimental preparation because of its relatively immense size (0.5–1 millimeters thick, several centimeters long)..

http://en.wikipedia.org/wiki/Neurons

Answer 4

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Firstly a larger brain has more cells not larger ones, as for trying to use brain size to determine intelligence it's a flawed concept, intellect has much more factors than simply the number of cells, how these cells are connected together and what they are devoted to forms a huge part of the intellectual abilities of the animal. And which areas it is better at for example an animal may have a lot of brain cells but with a huge percentage of those devoted to memory rather than processing, or devoted mainly to sensory perception rather than general processing (which is the area which gives rise to reasoning and other signs we would consider to be intelligence). They may also have more cells devoted to areas responsible for visualizing ideas (in essence creative thought) than for logical reasoning which again is what would outwardly show intelligence, there is of course the fact it is pretty much impossible to fairly test the intelligence of other species, we lack the ability to communicate effectively with them so it is impossible to truly assess their intellectual abilities not only that but any such method would have to be standardized on fair balanced set of abilities and attributes to test for which in itself would discriminate against some species more than others (depending what abilities the natural selection pressures they faced caused to evolve more readily). For an example, a species like a rabbit which is predominantly a prey animal would need skills that mainly help it to evade predators such as for example a good sense of navigation (to quickly access safe places). The predator on the other hand, needs to have skills that allow it to accurately deduce the speed and distance of a prey, evaluate the prey's abilities (is it too fast for me, or too big?), and to be effective at judging the likely behavior of the prey creature to make corrections in anticipation of those movements. Those are both different skill sets, and there are other specialties depending on the species ecological niche which would affect it's skill set, knowing this how could we develop a fair unbiased test for measuring inter species intelligence without putting some at a disadvantage, especially when we have to use a common methodology for all species otherwise any comparison across different methodologies would be scientifically invalid. Of course we can't communicate with other species anyway so it is kind of pointless thinking about comparing intelligence anyway.

Answer 5

an unfertilized ostrich egg is the largest cell known to man.. if you mean in a human body then yes it is the female egg.

Answer 6

Ovary of female is largest cell known to man
& sperm of male is smallest cell ok ?