Cell Membrane: Robert Hooke in 1665, 1st views the cells under the microscope & hence, he's credited with the discovery of cell membranes.
Cytosol: Discovered in 1835 & no scientist has been accredited to its discovery.
Centriole & Centrosome: Discovered by Edouard Van Beneden in 1883.
Centriole & Centrosome: Was described & coined by Theodor Boveri in 1888.
Cytoskeleton: Nikolai K Koltsov in 1903 proposed that the shape of the cells determines by the tubular network, the cytoskeleton.
Cytoskeleton: However, the word was introduced & coined by Paul Wintrebert in 1931.
Microtubules: De Robertis & Franchi discovered microtubules in nerve cells in 1953.
Microtubules: in 1963, Sabatini, Bansch, Barnette explained the structure of microtubule.
Microfilament/Actin Filaments: Edward David Korn discovered microfilament in Acanthamoeba castellanii in 1968.
Intermediate Filaments: The group of Howard Holtzer discovered Intermediate Filaments in 1968.