Can the next drawing be done? and if possible as a nice 3-d editable object that can be displayed part by part (as using visible<1> visible<2>).

That is the best I can do, which I am not satisfied with.
\documentclass{article}
\usepackage{tikz}
\begin{document}
% begin Nerve Cell2
\begin{minipage}[c]{1\textwidth}
\hskip 4cm
{
\tikz \shade[inner color=yellow, outer color=red] (0,0)circle(.5cm);
\vskip -.18cm
\hskip .86cm
\tikz % multiple lines, with rounded corners
\draw[thick,rounded corners=10pt, red, top color=red, bottom color=red, middle color=red!25]
(0,0)--(0,-1)--(3.5,-1)--(4.2,-.8)--(3.4,-1.12)--(4.2,-1.1)--(3.4,-1.22)--(4.2,-1.4)--(3.4,-1.34)--(4.2,-1.65)--(3.4,-1.45)--(-3.5,-1.45)--(-4.,-2)--(-3.54,-1.25)--(-4.,-.5)--(-3.5,-1)--(-.5,-1)--(-.5,0)--cycle;
\vskip -1.32cm
\hskip .1cm
\begin{tikzpicture}[rounded corners=10pt,ultra thick]
\shade[inner color=yellow, outer color=green] (.25,1.4)circle(.5cm);
\end{tikzpicture}
\vskip -.86cm
\hskip -1.78cm
\begin{tikzpicture}[rounded corners=10pt,ultra thick]
\shade[outer color=green, ,inner color=green!35] (-1.6,-.42)rectangle+(2,.7);
\end{tikzpicture}
}
\end{minipage}
% end Nerve Cell2
\end{document}

\includegraphics. – Ignasi Dec 16 '15 at 09:57greenif you wantredorblue? That's why I can't understand why you'd write that trying to draw this. And you haven't said what you mean by 3D. TikZ does not support real 3D editable objects or real 3D at all. You can at best fake 3D in 2D. That means that if, say, you want to adjust the viewing angle, you have to redo the code. – cfr Jan 18 '16 at 02:30