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The approximate number of cells in the human body is 3.72 x 10^13.
no some cells only last a few days or hours while some can last for years at a time
1 cm is 10000 microns so 10000/30 = 333 cells
Hexagons are six-sided figures like a bee's honeycomb cells. The perimeter of a regular hexagon will be found by multiplying the length of one side by 6.
Since it is easier to conjoin hexagonal cells up to any length and width of any shape, bees prefer a hexagonal hive to any other shape. They have manageable number of sides.
They are approximately 60 micrometers by 20 micrometers, so as a ratio it would be 3:1.
lining the what?
Beating ciliated epithelial cells
Pseudostratified columnar cells line the inside of the trachea and simple squamous cells make up the alveoli
Both the human and grasshopper respiratory systems have structures called trachea that are lined with epithelial cells.
indeed smoke can because the fumes kill the epithelial cells that line your trachea.. the epithelial cells are quite important as they catch bacteria and other particles that could clog up the lungs so it could leave you open to infection or irritable lungs
Renal epithelial cells are the cells lining the renal tubules.
Stem cells
Stem Cells
Psuedostratified epithelial tissue is epithelial tissue that looks as though it is multiple layers, i.e. stratified, but actually each cell is anchored to the basement membrane. It can be found chiefly lining the respiratory tract.
In the lumen of the trachea, this is the area that is in contact with the air coming in.Cilia are projections on the end of columnar epithelial cells that line the trachea (windpipe), they are responsible for beating (in a 'waving' motion) mucus filled with debris up the trachea out of the lungs and to the epiglottis where it can be swallowed and broken down safely in the stomach.
Epithelial cells are the outer cells of the skin.