The advantage of these systems is that they can function as a remote third ear, one that can be located close to the source of the desired sound. Amplified Telephones Designed for hearing-impaired people, these are special telephone handsets that amplify sound.
The most striking feature of skeletal muscle fibers is the presence of striations that are conspicuous in longitudinally sectioned fibers. The striations are due to the presence of myofibrils, which are cylindrical bundles of thick and thin myofilaments, organized into units of contraction called sarcomeres.he most striking feature of skeletal muscle fibers is the presence of striations that are conspicuous in longitudinally sectioned fibers. The striations are due to the presence of myofibrils, which are cylindrical bundles of thick and thin myofilaments, organized into units of contraction called sarcomeres.
Skeletal muscles (Voluntary/striated) are muscles whose action is under voluntary control. Cardiac muscle: found only in the heart. it is striated, but produces rhytmic involuntary contractions like smooth muscle. Smooth muscles (involuntary/ visceral muscles) are muscles whose actions are involuntary.