myofibrilsComponents of myofibrils:EMlong,parallel,cylindricalfilamentous bundles consisting of two types of myofilament (thin & thick)ThickIbandHbandFilamentMZZMZSarcomereAbandThinFilament
16 myofibrils * Components of myofibrils: EM v long , parallel , cylindrical filamentous bundles v consisting of two types of myofilament (thin & thick)
工sarcomere工AHAZZaNotethe sarcomereXwithitsA,I,and HbandsIand Z linez*ThepositionofthethickandthinfilamentsinthesarcomereisshownTransversesectionofskeletalschematicallyinthelowermuscle myofibrils. I, I band:17part ofthe figure.A, A band; H, H band; Z, Z line
17 v Note the sarcomere with its A, I, and H bands and Z line. v The position of the thick and thin filaments in the sarcomere is shown schematically in the lower part of the figure. v Transverse section of skeletal muscle myofibrils. I, I band; A, A band; H, H band; Z, Z line H A Z I A H I sarcomere I Z Z