Question

Estimates of the number of cells in the human body vary over an order of magnitude. Indeed, the precise number varies from one individual to another and depends on whether you count bacterial cells. Complete parts (a) through (c) below.

a. Assume that an average cell has a diameter of 7 micrometers (7 times 10 Superscript negative 6 meter), which means it has a volume of 200 cubic micrometers. How many cells are there in a cubic centimeter? ___cells per cm cubed (Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to two decimal places as needed.)

b. Estimate the number of cells in a liter, using the fact that a cubic centimeter equals a milliliter. _______cells per liter (Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to two decimal places as needed.)

c. Estimate the number of cells in a(n) 62 -kilogram (137 -pound) person, assuming the human body is 100% water (actually it is 60dash 70% water) and that 1 liter of water weighs 1 kilogram. ______ cells per person

Answer 1

a) cubic micrometers is cubic centimeter

So number of cells in one cubic centimeter is

b) 1 cubic centimeter is a mililiter and One liter is milliliter so that the number of cells in one liter is

c) Average human body is liters and each liter has cells so total cells is

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