help define these pls

Makeup of muscles:

• Z-line

• G actin

• F actin

• troponin

• Tropomyosin

• Myofilament

• Intercalated disc

• Sarcolemma

• Sarcoplasmic reticulum

• Myofibril

• Fascicle

• Thin filament

• Thick filament

• T-tubules