Thousands of fans traveled to Graceland on August 16, 2012âthe 35th anniversary of Elvis Presley's deathâfor a special vigil in honor of the King of Rock 'n' Roll. During the gathering, fans held lit candles and stood outside of Presley's home.
A section of a tangent vector bundle is a vector field. In the mathematical field of topology, a section (or cross section) of a fiber bundle is a continuous right inverse of the function. In other words, if is a fiber bundle over a base space, : then a section of that fiber bundle is a continuous map, such that.
Looking at one muscle fiber, you will see that almost the entire cross section of the muscle fiber is taken up by long, cylindrical strands of contractile proteins called myofibrils. Typically there are hundreds of these in one cross section of a muscle fiber.ooking at one myofibril, we see that it is divided into segments called sarcomeres. These are the contractile units of a muscle. A dark stripe called a Z disc marks the ends of one sarcomere and the beginning of the next. Sarcomeres are composed of thick filaments and thin filaments.