生物的なもの

\documentclass[b5j,10pt,twoside]{tetsujsarticle}
\usepackage{tetsuryoku}
\pagestyle{empty}
\begin{document}


\begin{tikzpicture}
\draw circle(2);
\foreach \t in {45,90,...,360}{
  \fill (\t-22.5:1.5) circle (0.2);
  \draw (\t:0) -- (\t:2);
}
\filldraw[fill=white,decorate, decoration={snake, segment length=1mm, amplitude=0.3}] circle[radius=1] ;
\end{tikzpicture}

\begin{tikzpicture}[font=\gtfamily]
\filldraw[thick,fill=black!20!white,decorate, decoration={zigzag, segment length=5.415, amplitude=1.5}] circle [radius=1] ;
\node[rotate=-15] {\parbox{4zw}{\centering 過去問に\\挑戦！\inhibitglue }};
\end{tikzpicture}


\end{document}