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From 2012.igem.org

Tadpole's volume calculation

The tadpole shape is approximated by a cone and a sphere.

Volume of the tail

r_b = 0.035cm
H = 0.8cm

Volume of the head

r_h = 0.3cm

Volume of the tadpole

Volume of the skin

To compute the volume of the skin we do the difference between the external and internal sphere/cone. T_skin = 35 * 10^-4 cm First the volume for the skin in the head: Then the volume for the skin in the tail: Finally the whole tadpole skin volume:

Volume of the blood

According to a study published in the article "The Blood-Volume of Cold-Blooded Animals as Determined by Experiments Upon Frogs and Lizards", the average volume of blood in a frog in cubic centimetre is equal to 4.61% of its masse in grammes. We took the same percentage for a tadpole.
For the masse, we mesured m_g=1mg for a wet-weighed 5-days tadpole.

Volume of the receptor

We considered the receptor as any tissue which can recept the auxin via the blood except the skin.