Myofibrils are the building blocks or contractile unit of each muscle fiber. The tiniest functional unit of skeletal muscle, the sarcomere, is found in the myofibrils and is made up of protein filaments: actin (thin) and myosin (thick).
Yes D is the right answer
B. because other units are either too small or too large to work with or <span>C. so they can communicate findings without confusion.
You can't tell me that not right</span>
Enzymes, to eat their nutrients and get energy from them.
