Английская Википедия:Biconcave disc

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A biconcave disc model of a discocyte
Файл:Biconcave disc.svg

A biconcave disc — also referred to as a discocyte[1] — is a geometric shape resembling an oblate spheroid with two concavities on the top and on the bottom.

Biconcave discs appear in the study of cell biology, where it is meta-stable, and involves the continuous adjustment of the asymmetric transbilayer lipid distribution, which is correlated with ATP depletion.[2]

Mathematical model

A biconcave disc can be described mathematically by

<math>z(r) = D \sqrt{1 - \frac{4r^2}{D^2}} \left(a_0 + \frac{a_1 r^2}{D^2} + \frac{a_2 r^4}{D^4} \right)</math>

where Шаблон:Math is the height of the surface as a function of radius Шаблон:Math, Шаблон:Math is the diameter of the disc, and Шаблон:Math are coefficients describing the shape. The above model describes a smooth surface; actual cells can be much more irregular.

Biology

Erythrocytes are in the shape of a biconcave disc. An erythrocyte is also known as a red blood cell and transports oxygen to and from tissues. [1][3]

References

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Шаблон:Biology-stub