Numbering of photo and table captions

Question

Instead of having captions such as Caption 2.1, Caption 2.2 and so on, I would like to have Caption 1, Caption 2 etc. in my document, e.g. the captions which are not related to the chapters. I am using the following code:

\begin{figure}[!ht]
  \centering
    \includegraphics[width=0.7\textwidth]{prizemlje}
    \caption{Osnova prizemlja \cite{5}}
\end{figure}