The kidney has an important role in the regulation of the plasma concentration and blood volume. The photograph shows a Bowman's capsule (renal capsule). The line from X to Y shows the diameter of the Bowman's capsule. (Source: © Science Photo Library/Alamy Stock Photo) The diameter from X to Y is 70 nm . Calculate the volume of this Bowman's capsule. Assume that this Bowman's capsule is spherical. Use the equation: $$\[ V=\frac{4}{3} \pi r^{3} \]$$ Give your answer to two significant figures. (2) Answer .......................................................... . $$\(n m^{3}\)$$

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