$\begin{array}{|c|c|c|}
\hline & \text{Characteristics} & \text{Examples} \\
\hline \text{(a)} & \begin{array}{c}
\text{Fluid cartilage between two bones, limited} \\
\text{movements}
\end{array} & \text{Knee joints} \\
\hline \text{(b)} & \begin{array}{c}
\text{Fluid filled between two joints, provides} \\
\text{cushion}
\end{array} & \text{Skull bones} \\
\hline \text{(c)} & \text{Fluid filled synovial cavity between two bones} & \begin{array}{c}
\text{Joint between atlas and} \\
\text{axis}
\end{array} \\
\hline \text{(d)} & \begin{array}{c}
\text{Lymph filled between two bones, very limited} \\
\text{movement}
\end{array} & \begin{array}{c}
\text{Gliding joint between} \\
\text{carpals}
\end{array} \\
\hline
\end{array}$
(a)
(b)
(c)
(d)
Solution
Joint between atlas and axis is pivot joint, which is an example of synovial joint characterised by the presence of a fluid-filled synovial cavity between the articulating surface of the two bones. Knee joint (hinge joint) is a synovial joint characterised by the presence of fluid filled synovial cavity between the articulating surfaces of the two bones. Fluid cartilage between two bones having limited movements is slightly movable joint. In freely movable joints fluid filled between two joints provides cushion in gliding joint, the articulating bones can slide upon one another.