Relationships between ln(body mass) and ln(half-life) for tissue types in A) birds and B) mammals.

<p>Numbers correspond with <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116182#pone.0116182.t004" target="_blank">Table 4</a>. Symbols: filled triangles = blood; open circles = organs, filled circles = muscle, filled squares = plasma.</p>