Simplify the following text for a Grade 14 native English-speaking person.
Original: Eukaryote cells contain three main kinds of cytoskeletal filaments , which are microfilaments ( Actin filaments ) , intermediate filaments , and microtubules .
Simplified: Eukaryotic cells contain three main kinds of cytoskeletal filaments , which are microfilaments , intermediate filaments , and microtubules .