Sure! Here is the filled-in table based on typical functions of various organs involved in excretion:
[tex]\[
\begin{array}{|c|c|c|c|}
\hline \text{ORGAN} & \begin{array}{c}
\text{WASTE} \\
\text{PRODUCT/S}
\end{array} & \text{ORIGIN} & \begin{array}{c}
\text{PRODUCT} \\
\text{EXCRETED}
\end{array} \\
\hline 1. \text{Lungs} & \text{CO}_2 \text{ and water} & \text{Cellular respiration} & \begin{array}{l}
\text{CO}_2 \text{ and water in} \\
\text{exhaled air}
\end{array} \\
\hline \begin{array}{c}
2. \text{Skin (sweat} \\
\text{glands)}
\end{array} & \begin{array}{l}
\text{Water, urea, and} \\
\text{excess salts}
\end{array} & \text{Extracted from blood} & \text{Sweat} \\
\hline \multirow[t]{2}{*}{3. \text{Kidneys}} & \text{Urea} & \text{Breakdown of proteins} & \text{Urine} \\
\cline{2-4} & \begin{array}{l}
\text{Excess water and} \\
\text{soluble salts}
\end{array} & \text{Blood filtration} & \text{Urine} \\
\hline \text{Liver} & \begin{array}{l}
\text{Bile pigments from} \\
\text{breakdown of} \\
\text{Haemoglobin}
\end{array} & \text{Breakdown of Haemoglobin} & \text{Faeces} \\
\hline \multirow[t]{2}{*}{4. \text{Colon}} & \begin{array}{l}
\text{Bacterial products and} \\
\text{undigested food}
\end{array} & \begin{array}{l}
\text{Breakdown of} \\
\text{Haemoglobin}
\end{array} & \text{Faeces} \\
\hline 5. \text{Kidneys} & \begin{array}{l}
\text{Excess mineral} \\
\text{salts}
\end{array} & - & \text{Urine} \\
\hline \end{array}
\][/tex]
