\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}[scale=2.1]
\begin{scope}
\fill[fill=cyan!20, ] (1,0) arc (0:180:1);
\clip (-1,0) -- (1,0) arc (0:180:1);
\foreach \r in {.125,.25,...,1}
\draw[blue] (0,0) circle (\r);
\foreach \s in {0,...,18}
\draw [red] ({cos (18*\s )}, {sin (18*\s )})--(0,0);
\end{scope}
\draw[very thick] (-1,0) -- (1,0) arc (0:180:1);
\end{tikzpicture}
\begin{tikzpicture}[scale=1]
\fill[cyan!20] (-4.3,0) rectangle (4.3,-2.8);
\draw[ultra thick,] (4.3,0)--(2,0) node[above] {$1$};
\draw[ultra thick,] (-4.3,0)--(-2,0) node[above] {$-1$};;
\draw[ultra thick,] (2,0)--(-2,0);
\begin{scope}
\clip (-4,-2.8) rectangle (4,0);
\foreach \r in {.15,.2,...,.9}
\draw[blue] (0,0) ellipse ({(\r+1/\r)} and {(-\r+1/\r)} );
\foreach \s in {0,.5,...,10}
\draw[red, domain=-3:3] plot[parametric] function{ cos(pi*\s/10)*cosh(t),sin(pi*\s/10)*sinh(t) };
\end{scope}
\draw[very thin, ->] (-4.3,0)--(4.3,0);
\draw[very thin, ->] (0,0.3)--(0,-2.8);
\end{tikzpicture}
\end{document}