Simplify the following text for a Grade 12 native English-speaking person.
Original: The concept of a protein mosaic that dynamically coordinated cytoplasmic biochemistry was proposed by Rudolph Peters in 1929 while the term ( cytosquelette , in French ) was first introduced by French embryologist Paul Wintrebert in 1931 .
Simplified: The concept and the term ( cytosquelette , in French ) was introduced by French embryologist Paul Wintrebert in 1931 .