The dip in the red blood cell provides more surface area
Cell specialization—structure and function

In many multicellular organisms, each type of cell is specialized to perform a specific function.

Analyzing the structure of a cell can help you:

1. Understand what the cell's function is.
2. Understand how the cell's structure helps it complete its job.

Cheek cells are thin and flat to better fit against the side of the mouth.
Root hair cells have an extension of the cytoplasm to create more surface area for absorbing water.
A nerve cell (neuron) is very long so it can carry nerve impulses over long distances.
Click here to see the structure of a neuron