Simplify the following text for a Grade 8 native English-speaking person.
Original: Peripheral proteins are proteins that are bounded to the membrane by electrostatic interactions and hydrogen bonding with the hydrophilic phospholipid heads . Many of these proteins can be found bounded to the surfaces of integral proteins on either the cytoplasimic side of the cell or the extracellular side of the membrane .
Simplified: Some proteins are always stuck into it , these are called integral membrane proteins .