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.
Ends: A typical skeletal muscle consists of two ends. These are; 1  Origin is one end of the muscle which remains fixed during its contraction. 2  Insertion is the other end which moves during its contraction. 3  In the limb muscles, the origin is usually proximal to insertion.arts: A typical skeletal muscle consists of two parts. These are; 1  Fleshy part is contractile, and is called the âbellyâ. 2  Fibrous part is non-contractile and inelastic. 3  When cord-like or rope-like, it is called tendon; when flattened, it is called aponeurosis.