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The brow spot is a mark left behind after the skull development of the frog. Before the skull is fully formed, there is a large gap between front and back bones creating a hole, much like the fontanel of a newborn human. A gland called the pineal gland, an outgrowth of the brain, reaches the surface of the frogs head during this time. As the parts of the skull close during development, the pineal gland gets pushed back and the brow spot is formed, marking its former connection with the surface. There is no function of this brow spot, other than happening to display the spot where part of the skull development took place.
The brow spot does not have a function. it simply marks the spot where, before the skull had developed and closed, part of the brain reached the surface. After the skull formed and closed, the hole was shut and the brain was separated from the surface leaving a brow spot.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoThe brown spot is the vestigial eye (represented by a white dot) located between the eyeballs.
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