How does the shape of palisade parenchyma relate to function?

A good example of specialized cell shape is the neuron. They must be very long and skinny to allow the nervous system to function. Another example is epithelial cells, including skin cells, which...

The Red Blood Cells shape is a bowl like shape. This will help it carry Oxygen and Carbon Dioxide more easily.

its long, and thin.. and specifically designed to contract/shorten up during certain times. Its structure and its contractile ability directly influence it's function.

Based on the location, what do you think is the funcion of cheek cells?

Basically the structure and shape are asymmetrical and tightly packed and basically they send signals to the gland filled with saliva.