dÃ©jÃ  vu [(day-zhah vooh)] The strange sensation that something one is now experiencing has happened before: âI knew I had never been in the house before, but as I walked up the staircase, I got a weird sense of dÃ©jÃ  vu.â From French, meaning âalready seen.â.
Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell.uscle tissues are derived from the mesodermal layer of embryonic germ cells in a process known as myogenesis. There are three types of muscle, skeletal or striated, cardiac, and smooth.
Broadly speaking, the muscular system of the human body is composed of three distinct types of muscles-skeletal muscles, smooth muscles, and the cardiac muscle. The skeletal muscles are what we know as voluntary muscles, and these muscles are those, that we can train and develop by using muscle-building methods.The smooth muscles are the involuntary muscles.he skeletal muscles are what we know as voluntary muscles, and these muscles are those, that we can train and develop by using muscle-building methods. The smooth muscles are the involuntary muscles.